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Vulnerability Details :

CVE-2020-15656

Summary
Assigner-mozilla
Assigner Org ID-f16b083a-5664-49f3-a51e-8d479e5ed7fe
Published At-10 Aug, 2020 | 17:43
Updated At-04 Aug, 2024 | 13:22
Rejected At-
Credits

JIT optimizations involving the Javascript arguments object could confuse later optimizations. This risk was already mitigated by various precautions in the code, resulting in this bug rated at only moderate severity. This vulnerability affects Firefox ESR < 78.1, Firefox < 79, and Thunderbird < 78.1.

Vendors
-
Not available
Products
-
Metrics (CVSS)
VersionBase scoreBase severityVector
Weaknesses
Attack Patterns
Solution/Workaround
References
HyperlinkResource Type
EPSS History
Score
Latest Score
-
N/A
No data available for selected date range
Percentile
Latest Percentile
-
N/A
No data available for selected date range
Stakeholder-Specific Vulnerability Categorization (SSVC)
▼Common Vulnerabilities and Exposures (CVE)
cve.org
Assigner:mozilla
Assigner Org ID:f16b083a-5664-49f3-a51e-8d479e5ed7fe
Published At:10 Aug, 2020 | 17:43
Updated At:04 Aug, 2024 | 13:22
Rejected At:
▼CVE Numbering Authority (CNA)

JIT optimizations involving the Javascript arguments object could confuse later optimizations. This risk was already mitigated by various precautions in the code, resulting in this bug rated at only moderate severity. This vulnerability affects Firefox ESR < 78.1, Firefox < 79, and Thunderbird < 78.1.

Affected Products
Vendor
Mozilla CorporationMozilla
Product
Firefox ESR
Versions
Affected
  • From unspecified before 78.1 (custom)
Vendor
Mozilla CorporationMozilla
Product
Firefox
Versions
Affected
  • From unspecified before 79 (custom)
Vendor
Mozilla CorporationMozilla
Product
Thunderbird
Versions
Affected
  • From unspecified before 78.1 (custom)
Problem Types
TypeCWE IDDescription
textN/AType confusion for special arguments in IonMonkey
Type: text
CWE ID: N/A
Description: Type confusion for special arguments in IonMonkey
Metrics
VersionBase scoreBase severityVector
Metrics Other Info
Impacts
CAPEC IDDescription
Solutions

Configurations

Workarounds

Exploits

Credits

Timeline
EventDate
Replaced By

Rejected Reason

References
HyperlinkResource
https://www.mozilla.org/security/advisories/mfsa2020-30/
x_refsource_MISC
https://www.mozilla.org/security/advisories/mfsa2020-32/
x_refsource_MISC
https://www.mozilla.org/security/advisories/mfsa2020-33/
x_refsource_MISC
https://bugzilla.mozilla.org/show_bug.cgi?id=1647293
x_refsource_MISC
http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00025.html
vendor-advisory
x_refsource_SUSE
https://usn.ubuntu.com/4443-1/
vendor-advisory
x_refsource_UBUNTU
Hyperlink: https://www.mozilla.org/security/advisories/mfsa2020-30/
Resource:
x_refsource_MISC
Hyperlink: https://www.mozilla.org/security/advisories/mfsa2020-32/
Resource:
x_refsource_MISC
Hyperlink: https://www.mozilla.org/security/advisories/mfsa2020-33/
Resource:
x_refsource_MISC
Hyperlink: https://bugzilla.mozilla.org/show_bug.cgi?id=1647293
Resource:
x_refsource_MISC
Hyperlink: http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00025.html
Resource:
vendor-advisory
x_refsource_SUSE
Hyperlink: https://usn.ubuntu.com/4443-1/
Resource:
vendor-advisory
x_refsource_UBUNTU
▼Authorized Data Publishers (ADP)
CVE Program Container
Affected Products
Metrics
VersionBase scoreBase severityVector
Metrics Other Info
Impacts
CAPEC IDDescription
Solutions

Configurations

Workarounds

Exploits

Credits

Timeline
EventDate
Replaced By

Rejected Reason

References
HyperlinkResource
https://www.mozilla.org/security/advisories/mfsa2020-30/
x_refsource_MISC
x_transferred
https://www.mozilla.org/security/advisories/mfsa2020-32/
x_refsource_MISC
x_transferred
https://www.mozilla.org/security/advisories/mfsa2020-33/
x_refsource_MISC
x_transferred
https://bugzilla.mozilla.org/show_bug.cgi?id=1647293
x_refsource_MISC
x_transferred
http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00025.html
vendor-advisory
x_refsource_SUSE
x_transferred
https://usn.ubuntu.com/4443-1/
vendor-advisory
x_refsource_UBUNTU
x_transferred
Hyperlink: https://www.mozilla.org/security/advisories/mfsa2020-30/
Resource:
x_refsource_MISC
x_transferred
Hyperlink: https://www.mozilla.org/security/advisories/mfsa2020-32/
Resource:
x_refsource_MISC
x_transferred
Hyperlink: https://www.mozilla.org/security/advisories/mfsa2020-33/
Resource:
x_refsource_MISC
x_transferred
Hyperlink: https://bugzilla.mozilla.org/show_bug.cgi?id=1647293
Resource:
x_refsource_MISC
x_transferred
Hyperlink: http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00025.html
Resource:
vendor-advisory
x_refsource_SUSE
x_transferred
Hyperlink: https://usn.ubuntu.com/4443-1/
Resource:
vendor-advisory
x_refsource_UBUNTU
x_transferred
Information is not available yet
▼National Vulnerability Database (NVD)
nvd.nist.gov
Source:security@mozilla.org
Published At:10 Aug, 2020 | 18:15
Updated At:02 Feb, 2023 | 22:19

JIT optimizations involving the Javascript arguments object could confuse later optimizations. This risk was already mitigated by various precautions in the code, resulting in this bug rated at only moderate severity. This vulnerability affects Firefox ESR < 78.1, Firefox < 79, and Thunderbird < 78.1.

CISA Catalog
Date AddedDue DateVulnerability NameRequired Action
N/A
Date Added: N/A
Due Date: N/A
Vulnerability Name: N/A
Required Action: N/A
Metrics
TypeVersionBase scoreBase severityVector
Primary3.18.8HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Primary2.09.3HIGH
AV:N/AC:M/Au:N/C:C/I:C/A:C
Type: Primary
Version: 3.1
Base score: 8.8
Base severity: HIGH
Vector:
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Type: Primary
Version: 2.0
Base score: 9.3
Base severity: HIGH
Vector:
AV:N/AC:M/Au:N/C:C/I:C/A:C
CPE Matches

Mozilla Corporation
mozilla
>>firefox>>Versions before 79.0(exclusive)
cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:*
Mozilla Corporation
mozilla
>>firefox_esr>>Versions before 78.1(exclusive)
cpe:2.3:a:mozilla:firefox_esr:*:*:*:*:*:*:*:*
Mozilla Corporation
mozilla
>>thunderbird>>Versions before 78.1(exclusive)
cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:*
openSUSE
opensuse
>>leap>>15.2
cpe:2.3:o:opensuse:leap:15.2:*:*:*:*:*:*:*
Canonical Ltd.
canonical
>>ubuntu_linux>>16.04
cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:esm:*:*:*
Canonical Ltd.
canonical
>>ubuntu_linux>>18.04
cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:*
Canonical Ltd.
canonical
>>ubuntu_linux>>20.04
cpe:2.3:o:canonical:ubuntu_linux:20.04:*:*:*:lts:*:*:*
Weaknesses
CWE IDTypeSource
CWE-843Primarynvd@nist.gov
CWE ID: CWE-843
Type: Primary
Source: nvd@nist.gov
Evaluator Description

Evaluator Impact

Evaluator Solution

Vendor Statements

References
HyperlinkSourceResource
http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00025.htmlsecurity@mozilla.org
Third Party Advisory
https://bugzilla.mozilla.org/show_bug.cgi?id=1647293security@mozilla.org
Issue Tracking
Permissions Required
Vendor Advisory
https://usn.ubuntu.com/4443-1/security@mozilla.org
Third Party Advisory
https://www.mozilla.org/security/advisories/mfsa2020-30/security@mozilla.org
Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2020-32/security@mozilla.org
Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2020-33/security@mozilla.org
Vendor Advisory
Hyperlink: http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00025.html
Source: security@mozilla.org
Resource:
Third Party Advisory
Hyperlink: https://bugzilla.mozilla.org/show_bug.cgi?id=1647293
Source: security@mozilla.org
Resource:
Issue Tracking
Permissions Required
Vendor Advisory
Hyperlink: https://usn.ubuntu.com/4443-1/
Source: security@mozilla.org
Resource:
Third Party Advisory
Hyperlink: https://www.mozilla.org/security/advisories/mfsa2020-30/
Source: security@mozilla.org
Resource:
Vendor Advisory
Hyperlink: https://www.mozilla.org/security/advisories/mfsa2020-32/
Source: security@mozilla.org
Resource:
Vendor Advisory
Hyperlink: https://www.mozilla.org/security/advisories/mfsa2020-33/
Source: security@mozilla.org
Resource:
Vendor Advisory

Change History

0
Information is not available yet

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||
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Action-Not Available
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Product-windows_10linux_enterprise_desktopmac_os_xwindows_8.1enterprise_linux_serverenterprise_linux_workstationlinux_enterprise_workstation_extensionenterprise_linux_desktopwindowsflash_playerlinux_kernelflash_player_desktop_runtimechrome_osopensusen/a
CWE ID-CWE-843
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CVE-2011-0611
Matching Score-10
Assigner-Adobe Systems Incorporated
ShareView Details
Matching Score-10
Assigner-Adobe Systems Incorporated
CVSS Score-8.8||HIGH
EPSS-94.20% / 99.84%
||
7 Day CHG-5.21%
Published-13 Apr, 2011 | 14:00
Updated-21 Apr, 2026 | 20:30
Rejected-Not Available
Known To Be Used In Ransomware Campaigns?-Not Available
KEV Added-Not Available
KEV Action Due Date-Not Available
Known KEV||Action Due Date - 2022-03-24||The impacted product is end-of-life and should be disconnected if still in use.

Adobe Flash Player before 10.2.154.27 on Windows, Mac OS X, Linux, and Solaris and 10.2.156.12 and earlier on Android; Adobe AIR before 2.6.19140; and Authplay.dll (aka AuthPlayLib.bundle) in Adobe Reader 9.x before 9.4.4 and 10.x through 10.0.1 on Windows, Adobe Reader 9.x before 9.4.4 and 10.x before 10.0.3 on Mac OS X, and Adobe Acrobat 9.x before 9.4.4 and 10.x before 10.0.3 on Windows and Mac OS X allow remote attackers to execute arbitrary code or cause a denial of service (application crash) via crafted Flash content; as demonstrated by a Microsoft Office document with an embedded .swf file that has a size inconsistency in a "group of included constants," object type confusion, ActionScript that adds custom functions to prototypes, and Date objects; and as exploited in the wild in April 2011.

Action-Not Available
Vendor-n/aOracle CorporationApple Inc.Google LLCopenSUSEMicrosoft CorporationAdobe Inc.SUSELinux Kernel Organization, Inc
Product-acrobatacrobat_readeradobe_airmac_os_xlinux_enterprise_desktopsolariswindowsflash_playerchromeandroidlinux_kernelchrome_osopensusen/areaderflash_playerairacrobatFlash Player
CWE ID-CWE-843
Access of Resource Using Incompatible Type ('Type Confusion')
CVE-2020-6464
Matching Score-10
Assigner-Chrome
ShareView Details
Matching Score-10
Assigner-Chrome
CVSS Score-8.8||HIGH
EPSS-1.92% / 77.76%
||
7 Day CHG~0.00%
Published-21 May, 2020 | 03:46
Updated-04 Aug, 2024 | 09:02
Rejected-Not Available
Known To Be Used In Ransomware Campaigns?-Not Available
KEV Added-Not Available
KEV Action Due Date-Not Available

Type confusion in Blink in Google Chrome prior to 81.0.4044.138 allowed a remote attacker to potentially exploit heap corruption via a crafted HTML page.

Action-Not Available
Vendor-openSUSEGoogle LLCDebian GNU/Linux
Product-chromedebian_linuxleapChrome
CWE ID-CWE-787
Out-of-bounds Write
CWE ID-CWE-843
Access of Resource Using Incompatible Type ('Type Confusion')
CVE-2020-6512
Matching Score-10
Assigner-Chrome
ShareView Details
Matching Score-10
Assigner-Chrome
CVSS Score-8.8||HIGH
EPSS-2.93% / 85.62%
||
7 Day CHG-0.08%
Published-22 Jul, 2020 | 16:16
Updated-04 Aug, 2024 | 09:02
Rejected-Not Available
Known To Be Used In Ransomware Campaigns?-Not Available
KEV Added-Not Available
KEV Action Due Date-Not Available

Type Confusion in V8 in Google Chrome prior to 84.0.4147.89 allowed a remote attacker to potentially exploit heap corruption via a crafted HTML page.

Action-Not Available
Vendor-Google LLCopenSUSEFedora ProjectDebian GNU/Linux
Product-debian_linuxchromefedorabackports_sleleapChrome
CWE ID-CWE-787
Out-of-bounds Write
CWE ID-CWE-843
Access of Resource Using Incompatible Type ('Type Confusion')
CVE-2020-6468
Matching Score-10
Assigner-Chrome
ShareView Details
Matching Score-10
Assigner-Chrome
CVSS Score-8.8||HIGH
EPSS-6.41% / 92.96%
||
7 Day CHG~0.00%
Published-21 May, 2020 | 03:46
Updated-04 Aug, 2024 | 09:02
Rejected-Not Available
Known To Be Used In Ransomware Campaigns?-Not Available
KEV Added-Not Available
KEV Action Due Date-Not Available

Type confusion in V8 in Google Chrome prior to 83.0.4103.61 allowed a remote attacker to potentially exploit heap corruption via a crafted HTML page.

Action-Not Available
Vendor-Google LLCopenSUSEFedora ProjectDebian GNU/Linux
Product-debian_linuxchromefedorabackports_sleleapChrome
CWE ID-CWE-787
Out-of-bounds Write
CWE ID-CWE-843
Access of Resource Using Incompatible Type ('Type Confusion')
CVE-2020-15965
Matching Score-10
Assigner-Chrome
ShareView Details
Matching Score-10
Assigner-Chrome
CVSS Score-8.8||HIGH
EPSS-2.95% / 85.72%
||
7 Day CHG~0.00%
Published-21 Sep, 2020 | 19:06
Updated-04 Aug, 2024 | 13:30
Rejected-Not Available
Known To Be Used In Ransomware Campaigns?-Not Available
KEV Added-Not Available
KEV Action Due Date-Not Available

Type confusion in V8 in Google Chrome prior to 85.0.4183.121 allowed a remote attacker to potentially perform out of bounds memory access via a crafted HTML page.

Action-Not Available
Vendor-Google LLCopenSUSEFedora ProjectDebian GNU/Linux
Product-debian_linuxchromefedorabackports_sleleapChrome
CWE ID-CWE-843
Access of Resource Using Incompatible Type ('Type Confusion')
CVE-2020-16009
Matching Score-10
Assigner-Chrome
ShareView Details
Matching Score-10
Assigner-Chrome
CVSS Score-8.8||HIGH
EPSS-48.57% / 98.75%
||
7 Day CHG~0.00%
Published-03 Nov, 2020 | 02:21
Updated-24 Oct, 2025 | 20:56
Rejected-Not Available
Known To Be Used In Ransomware Campaigns?-Not Available
KEV Added-Not Available
KEV Action Due Date-Not Available
Known KEV||Action Due Date - 2022-05-03||Apply updates per vendor instructions.

Inappropriate implementation in V8 in Google Chrome prior to 86.0.4240.183 allowed a remote attacker to potentially exploit heap corruption via a crafted HTML page.

Action-Not Available
Vendor-cefsharpDebian GNU/LinuxopenSUSEMicrosoft CorporationFedora ProjectGoogle LLC
Product-debian_linuxbackports_slecefsharpedge_chromiumfedoraleapedgechromeChromeChromium V8
CWE ID-CWE-787
Out-of-bounds Write
CWE ID-CWE-843
Access of Resource Using Incompatible Type ('Type Confusion')
CVE-2020-12410
Matching Score-8
Assigner-Mozilla Corporation
ShareView Details
Matching Score-8
Assigner-Mozilla Corporation
CVSS Score-8.8||HIGH
EPSS-1.54% / 72.25%
||
7 Day CHG~0.00%
Published-09 Jul, 2020 | 14:45
Updated-04 Aug, 2024 | 11:56
Rejected-Not Available
Known To Be Used In Ransomware Campaigns?-Not Available
KEV Added-Not Available
KEV Action Due Date-Not Available

Mozilla developers reported memory safety bugs present in Firefox 76 and Firefox ESR 68.8. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. This vulnerability affects Thunderbird < 68.9.0, Firefox < 77, and Firefox ESR < 68.9.

Action-Not Available
Vendor-Mozilla CorporationCanonical Ltd.
Product-firefoxubuntu_linuxfirefox_esrThunderbirdFirefox ESRFirefox
CWE ID-CWE-787
Out-of-bounds Write
CVE-2026-8957
Matching Score-8
Assigner-Mozilla Corporation
ShareView Details
Matching Score-8
Assigner-Mozilla Corporation
CVSS Score-8.8||HIGH
EPSS-0.39% / 31.20%
||
7 Day CHG~0.00%
Published-19 May, 2026 | 12:29
Updated-20 May, 2026 | 17:16
Rejected-Not Available
Known To Be Used In Ransomware Campaigns?-Not Available
KEV Added-Not Available
KEV Action Due Date-Not Available
Privilege escalation in the Enterprise Policies component

Privilege escalation in the Enterprise Policies component. This vulnerability was fixed in Firefox 151, Firefox ESR 140.11, Thunderbird 151, and Thunderbird 140.11.

Action-Not Available
Vendor-Mozilla Corporation
Product-firefoxthunderbirdFirefoxThunderbird
CWE ID-CWE-269
Improper Privilege Management
CVE-2020-12406
Matching Score-8
Assigner-Mozilla Corporation
ShareView Details
Matching Score-8
Assigner-Mozilla Corporation
CVSS Score-8.8||HIGH
EPSS-1.02% / 59.82%
||
7 Day CHG~0.00%
Published-09 Jul, 2020 | 14:45
Updated-04 Aug, 2024 | 11:56
Rejected-Not Available
Known To Be Used In Ransomware Campaigns?-Not Available
KEV Added-Not Available
KEV Action Due Date-Not Available

Mozilla Developer Iain Ireland discovered a missing type check during unboxed objects removal, resulting in a crash. We presume that with enough effort that it could be exploited to run arbitrary code. This vulnerability affects Thunderbird < 68.9.0, Firefox < 77, and Firefox ESR < 68.9.

Action-Not Available
Vendor-Mozilla CorporationCanonical Ltd.
Product-firefoxubuntu_linuxthunderbirdfirefox_esrThunderbirdFirefox ESRFirefox
CWE ID-CWE-345
Insufficient Verification of Data Authenticity
CVE-2020-12409
Matching Score-8
Assigner-Mozilla Corporation
ShareView Details
Matching Score-8
Assigner-Mozilla Corporation
CVSS Score-8.8||HIGH
EPSS-1.02% / 59.82%
||
7 Day CHG~0.00%
Published-09 Jul, 2020 | 14:46
Updated-04 Aug, 2024 | 11:56
Rejected-Not Available
Known To Be Used In Ransomware Campaigns?-Not Available
KEV Added-Not Available
KEV Action Due Date-Not Available

When using certain blank characters in a URL, they where incorrectly rendered as spaces instead of an encoded URL. This vulnerability affects Firefox < 77.

Action-Not Available
Vendor-Mozilla Corporation
Product-firefoxFirefox
CVE-2026-8973
Matching Score-8
Assigner-Mozilla Corporation
ShareView Details
Matching Score-8
Assigner-Mozilla Corporation
CVSS Score-8.8||HIGH
EPSS-0.34% / 25.96%
||
7 Day CHG~0.00%
Published-19 May, 2026 | 12:30
Updated-23 Jul, 2026 | 20:10
Rejected-Not Available
Known To Be Used In Ransomware Campaigns?-Not Available
KEV Added-Not Available
KEV Action Due Date-Not Available
Memory safety bugs fixed in Firefox 151

Memory safety bugs present in Firefox 150. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. This vulnerability was fixed in Firefox 151 and Thunderbird 151.

Action-Not Available
Vendor-Red Hat, Inc.Mozilla Corporation
Product-thunderbirdfirefoxThunderbirdFirefoxRed Hat Enterprise Linux 9Red Hat Enterprise Linux 7Red Hat Enterprise Linux 6Red Hat Enterprise Linux 8Red Hat Enterprise Linux 10
CWE ID-CWE-119
Improper Restriction of Operations within the Bounds of a Memory Buffer
CWE ID-CWE-787
Out-of-bounds Write
CVE-2026-8955
Matching Score-8
Assigner-Mozilla Corporation
ShareView Details
Matching Score-8
Assigner-Mozilla Corporation
CVSS Score-8.8||HIGH
EPSS-0.39% / 31.20%
||
7 Day CHG~0.00%
Published-19 May, 2026 | 12:29
Updated-20 May, 2026 | 17:16
Rejected-Not Available
Known To Be Used In Ransomware Campaigns?-Not Available
KEV Added-Not Available
KEV Action Due Date-Not Available
Privilege escalation in the DOM: Workers component

Privilege escalation in the DOM: Workers component. This vulnerability was fixed in Firefox 151, Firefox ESR 140.11, Thunderbird 151, and Thunderbird 140.11.

Action-Not Available
Vendor-Mozilla Corporation
Product-firefoxthunderbirdFirefoxThunderbird
CWE ID-CWE-269
Improper Privilege Management
CVE-2026-8974
Matching Score-8
Assigner-Mozilla Corporation
ShareView Details
Matching Score-8
Assigner-Mozilla Corporation
CVSS Score-8.8||HIGH
EPSS-0.33% / 25.70%
||
7 Day CHG~0.00%
Published-19 May, 2026 | 12:30
Updated-23 Jul, 2026 | 20:10
Rejected-Not Available
Known To Be Used In Ransomware Campaigns?-Not Available
KEV Added-Not Available
KEV Action Due Date-Not Available
Memory safety bugs fixed in Firefox ESR 140.11 and Firefox 151

Memory safety bugs present in Firefox ESR 140.10 and Firefox 150. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. This vulnerability was fixed in Firefox 151, Firefox ESR 140.11, Thunderbird 151, and Thunderbird 140.11.

Action-Not Available
Vendor-Mozilla Corporation
Product-thunderbirdfirefoxFirefoxThunderbird
CWE ID-CWE-119
Improper Restriction of Operations within the Bounds of a Memory Buffer
CVE-2026-8970
Matching Score-8
Assigner-Mozilla Corporation
ShareView Details
Matching Score-8
Assigner-Mozilla Corporation
CVSS Score-8.8||HIGH
EPSS-0.31% / 22.99%
||
7 Day CHG~0.00%
Published-19 May, 2026 | 12:30
Updated-23 Jul, 2026 | 20:10
Rejected-Not Available
Known To Be Used In Ransomware Campaigns?-Not Available
KEV Added-Not Available
KEV Action Due Date-Not Available
Privilege escalation in the Security component

Privilege escalation in the Security component. This vulnerability was fixed in Firefox 151, Firefox ESR 140.11, Thunderbird 151, and Thunderbird 140.11.

Action-Not Available
Vendor-Mozilla Corporation
Product-thunderbirdfirefoxFirefoxThunderbird
CWE ID-CWE-269
Improper Privilege Management
CVE-2020-12422
Matching Score-8
Assigner-Mozilla Corporation
ShareView Details
Matching Score-8
Assigner-Mozilla Corporation
CVSS Score-8.8||HIGH
EPSS-1.94% / 77.98%
||
7 Day CHG~0.00%
Published-09 Jul, 2020 | 14:39
Updated-04 Aug, 2024 | 11:56
Rejected-Not Available
Known To Be Used In Ransomware Campaigns?-Not Available
KEV Added-Not Available
KEV Action Due Date-Not Available

In non-standard configurations, a JPEG image created by JavaScript could have caused an internal variable to overflow, resulting in an out of bounds write, memory corruption, and a potentially exploitable crash. This vulnerability affects Firefox < 78.

Action-Not Available
Vendor-openSUSEMozilla Corporation
Product-firefoxleapFirefox
CWE ID-CWE-787
Out-of-bounds Write
CVE-2020-12416
Matching Score-8
Assigner-Mozilla Corporation
ShareView Details
Matching Score-8
Assigner-Mozilla Corporation
CVSS Score-8.8||HIGH
EPSS-1.35% / 68.59%
||
7 Day CHG~0.00%
Published-09 Jul, 2020 | 14:40
Updated-04 Aug, 2024 | 11:56
Rejected-Not Available
Known To Be Used In Ransomware Campaigns?-Not Available
KEV Added-Not Available
KEV Action Due Date-Not Available

A VideoStreamEncoder may have been freed in a race condition with VideoBroadcaster::AddOrUpdateSink, resulting in a use-after-free, memory corruption, and a potentially exploitable crash. This vulnerability affects Firefox < 78.

Action-Not Available
Vendor-openSUSEMozilla Corporation
Product-firefoxleapFirefox
CWE ID-CWE-416
Use After Free
CWE ID-CWE-362
Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')
CVE-2020-12426
Matching Score-8
Assigner-Mozilla Corporation
ShareView Details
Matching Score-8
Assigner-Mozilla Corporation
CVSS Score-8.8||HIGH
EPSS-1.62% / 73.52%
||
7 Day CHG~0.00%
Published-09 Jul, 2020 | 14:39
Updated-04 Aug, 2024 | 11:56
Rejected-Not Available
Known To Be Used In Ransomware Campaigns?-Not Available
KEV Added-Not Available
KEV Action Due Date-Not Available

Mozilla developers and community members reported memory safety bugs present in Firefox 77. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. This vulnerability affects Firefox < 78.

Action-Not Available
Vendor-openSUSEMozilla Corporation
Product-firefoxleapFirefox
CWE ID-CWE-787
Out-of-bounds Write
CVE-2021-23987
Matching Score-8
Assigner-Mozilla Corporation
ShareView Details
Matching Score-8
Assigner-Mozilla Corporation
CVSS Score-8.8||HIGH
EPSS-1.40% / 69.76%
||
7 Day CHG~0.00%
Published-31 Mar, 2021 | 13:40
Updated-03 Aug, 2024 | 19:14
Rejected-Not Available
Known To Be Used In Ransomware Campaigns?-Not Available
KEV Added-Not Available
KEV Action Due Date-Not Available

Mozilla developers and community members reported memory safety bugs present in Firefox 86 and Firefox ESR 78.8. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. This vulnerability affects Firefox ESR < 78.9, Firefox < 87, and Thunderbird < 78.9.

Action-Not Available
Vendor-Mozilla Corporation
Product-firefoxthunderbirdfirefox_esrFirefoxFirefox ESRThunderbird
CWE ID-CWE-787
Out-of-bounds Write
CVE-2020-12420
Matching Score-8
Assigner-Mozilla Corporation
ShareView Details
Matching Score-8
Assigner-Mozilla Corporation
CVSS Score-8.8||HIGH
EPSS-1.86% / 77.02%
||
7 Day CHG~0.00%
Published-09 Jul, 2020 | 14:39
Updated-04 Aug, 2024 | 11:56
Rejected-Not Available
Known To Be Used In Ransomware Campaigns?-Not Available
KEV Added-Not Available
KEV Action Due Date-Not Available

When trying to connect to a STUN server, a race condition could have caused a use-after-free of a pointer, leading to memory corruption and a potentially exploitable crash. This vulnerability affects Firefox ESR < 68.10, Firefox < 78, and Thunderbird < 68.10.0.

Action-Not Available
Vendor-Canonical Ltd.openSUSEMozilla Corporation
Product-ubuntu_linuxthunderbirdfirefoxfirefox_esrleapFirefoxFirefox ESRThunderbird
CWE ID-CWE-416
Use After Free
CWE ID-CWE-362
Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')
CVE-2020-12411
Matching Score-8
Assigner-Mozilla Corporation
ShareView Details
Matching Score-8
Assigner-Mozilla Corporation
CVSS Score-8.8||HIGH
EPSS-1.17% / 64.09%
||
7 Day CHG~0.00%
Published-09 Jul, 2020 | 14:46
Updated-04 Aug, 2024 | 11:56
Rejected-Not Available
Known To Be Used In Ransomware Campaigns?-Not Available
KEV Added-Not Available
KEV Action Due Date-Not Available

Mozilla developers reported memory safety bugs present in Firefox 76. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. This vulnerability affects Firefox < 77.

Action-Not Available
Vendor-Mozilla Corporation
Product-firefoxFirefox
CWE ID-CWE-787
Out-of-bounds Write
CVE-2014-2397
Matching Score-8
Assigner-Oracle
ShareView Details
Matching Score-8
Assigner-Oracle
CVSS Score-9.3||HIGH
EPSS-5.51% / 91.96%
||
7 Day CHG~0.00%
Published-16 Apr, 2014 | 01:00
Updated-06 May, 2026 | 22:30
Rejected-Not Available
Known To Be Used In Ransomware Campaigns?-Not Available
KEV Added-Not Available
KEV Action Due Date-Not Available

Unspecified vulnerability in Oracle Java SE 7u51 and 8, and Java SE Embedded 7u51, allows remote attackers to affect confidentiality, integrity, and availability via unknown vectors related to Hotspot.

Action-Not Available
Vendor-n/aDebian GNU/LinuxCanonical Ltd.Oracle Corporation
Product-debian_linuxubuntu_linuxjdkjren/a
CVE-2012-1971
Matching Score-8
Assigner-MITRE Corporation
ShareView Details
Matching Score-8
Assigner-MITRE Corporation
CVSS Score-9.3||HIGH
EPSS-3.81% / 88.94%
||
7 Day CHG~0.00%
Published-29 Aug, 2012 | 10:00
Updated-29 Apr, 2026 | 01:13
Rejected-Not Available
Known To Be Used In Ransomware Campaigns?-Not Available
KEV Added-Not Available
KEV Action Due Date-Not Available

Multiple unspecified vulnerabilities in the browser engine in Mozilla Firefox before 15.0, Thunderbird before 15.0, and SeaMonkey before 2.12 allow remote attackers to cause a denial of service (memory corruption and application crash) or possibly execute arbitrary code via vectors related to garbage collection after certain MethodJIT execution, and unknown other vectors.

Action-Not Available
Vendor-n/aMozilla Corporation
Product-thunderbirdfirefoxseamonkeyn/a
CVE-2014-1518
Matching Score-8
Assigner-Mozilla Corporation
ShareView Details
Matching Score-8
Assigner-Mozilla Corporation
CVSS Score-8.8||HIGH
EPSS-5.98% / 92.53%
||
7 Day CHG~0.00%
Published-30 Apr, 2014 | 10:00
Updated-06 May, 2026 | 22:30
Rejected-Not Available
Known To Be Used In Ransomware Campaigns?-Not Available
KEV Added-Not Available
KEV Action Due Date-Not Available

Multiple unspecified vulnerabilities in the browser engine in Mozilla Firefox before 29.0, Firefox ESR 24.x before 24.5, Thunderbird before 24.5, and SeaMonkey before 2.26 allow remote attackers to cause a denial of service (memory corruption and application crash) or possibly execute arbitrary code via unknown vectors.

Action-Not Available
Vendor-n/aCanonical Ltd.openSUSESUSERed Hat, Inc.Mozilla CorporationDebian GNU/LinuxFedora Project
Product-thunderbirdenterprise_linux_eusfirefoxubuntu_linuxseamonkeydebian_linuxenterprise_linux_serverenterprise_linux_workstationsuse_linux_enterprise_serverenterprise_linux_server_tusenterprise_linux_desktopenterprise_linux_server_eusenterprise_linux_server_ausfedoraopensusen/a
CVE-2014-1958
Matching Score-8
Assigner-MITRE Corporation
ShareView Details
Matching Score-8
Assigner-MITRE Corporation
CVSS Score-8.8||HIGH
EPSS-3.54% / 88.07%
||
7 Day CHG~0.00%
Published-06 Feb, 2020 | 14:58
Updated-06 Aug, 2024 | 09:58
Rejected-Not Available
Known To Be Used In Ransomware Campaigns?-Not Available
KEV Added-Not Available
KEV Action Due Date-Not Available

Buffer overflow in the DecodePSDPixels function in coders/psd.c in ImageMagick before 6.8.8-5 might allow remote attackers to execute arbitrary code via a crafted PSD image, involving the L%06ld string, a different vulnerability than CVE-2014-2030.

Action-Not Available
Vendor-n/aImageMagick Studio LLCopenSUSECanonical Ltd.
Product-opensuseubuntu_linuximagemagickn/a
CWE ID-CWE-120
Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')
CVE-2014-1557
Matching Score-8
Assigner-Mozilla Corporation
ShareView Details
Matching Score-8
Assigner-Mozilla Corporation
CVSS Score-9.3||HIGH
EPSS-4.94% / 91.24%
||
7 Day CHG~0.00%
Published-23 Jul, 2014 | 10:00
Updated-06 May, 2026 | 22:30
Rejected-Not Available
Known To Be Used In Ransomware Campaigns?-Not Available
KEV Added-Not Available
KEV Action Due Date-Not Available

The ConvolveHorizontally function in Skia, as used in Mozilla Firefox before 31.0, Firefox ESR 24.x before 24.7, and Thunderbird before 24.7, does not properly handle the discarding of image data during function execution, which allows remote attackers to execute arbitrary code by triggering prolonged image scaling, as demonstrated by scaling of a high-quality image.

Action-Not Available
Vendor-n/aDebian GNU/LinuxMozilla CorporationOracle Corporation
Product-thunderbirddebian_linuxfirefoxfirefox_esrsolarisn/a
CWE ID-CWE-94
Improper Control of Generation of Code ('Code Injection')
CVE-2014-1525
Matching Score-8
Assigner-Mozilla Corporation
ShareView Details
Matching Score-8
Assigner-Mozilla Corporation
CVSS Score-9.3||HIGH
EPSS-4.41% / 90.33%
||
7 Day CHG~0.00%
Published-30 Apr, 2014 | 10:00
Updated-06 May, 2026 | 22:30
Rejected-Not Available
Known To Be Used In Ransomware Campaigns?-Not Available
KEV Added-Not Available
KEV Action Due Date-Not Available

The mozilla::dom::TextTrack::AddCue function in Mozilla Firefox before 29.0 and SeaMonkey before 2.26 does not properly perform garbage collection for Text Track Manager variables, which allows remote attackers to execute arbitrary code or cause a denial of service (use-after-free and heap memory corruption) via a crafted VIDEO element in an HTML document.

Action-Not Available
Vendor-n/aCanonical Ltd.openSUSEMozilla CorporationFedora Project
Product-firefoxubuntu_linuxseamonkeyfedoraopensusen/a
CWE ID-CWE-416
Use After Free
CWE ID-CWE-787
Out-of-bounds Write
CVE-2026-6750
Matching Score-8
Assigner-Mozilla Corporation
ShareView Details
Matching Score-8
Assigner-Mozilla Corporation
CVSS Score-8.8||HIGH
EPSS-0.48% / 38.87%
||
7 Day CHG~0.00%
Published-21 Apr, 2026 | 12:40
Updated-15 Jul, 2026 | 01:16
Rejected-Not Available
Known To Be Used In Ransomware Campaigns?-Not Available
KEV Added-Not Available
KEV Action Due Date-Not Available
Privilege escalation in the Graphics: WebRender component

Privilege escalation in the Graphics: WebRender component. This vulnerability was fixed in Firefox 150, Firefox ESR 115.35, Firefox ESR 140.10, Thunderbird 150, and Thunderbird 140.10.

Action-Not Available
Vendor-Red Hat, Inc.Mozilla Corporation
Product-thunderbirdfirefoxThunderbirdFirefoxRed Hat Enterprise Linux 8.6 Update Services for SAP SolutionsRed Hat Enterprise Linux 7Red Hat Enterprise Linux 6Red Hat Enterprise Linux 9.0 Update Services for SAP SolutionsRed Hat Enterprise Linux 9.4 Extended Update SupportRed Hat Enterprise Linux 10Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update SupportRed Hat Enterprise Linux 8.4 Advanced Mission Critical Update SupportRed Hat Enterprise Linux 8.8 Telecommunications Update ServiceRed Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-OnRed Hat Enterprise Linux 9Red Hat Enterprise Linux 9.2 Update Services for SAP SolutionsRed Hat Enterprise Linux 9.6 Extended Update SupportRed Hat Enterprise Linux 8Red Hat Enterprise Linux 7 Extended Lifecycle SupportRed Hat Enterprise Linux 8.6 Telecommunications Update ServiceRed Hat Enterprise Linux 8.8 Update Services for SAP SolutionsRed Hat Enterprise Linux 10.0 Extended Update Support
CWE ID-CWE-266
Incorrect Privilege Assignment
CWE ID-CWE-269
Improper Privilege Management
CVE-2026-6769
Matching Score-8
Assigner-Mozilla Corporation
ShareView Details
Matching Score-8
Assigner-Mozilla Corporation
CVSS Score-8.8||HIGH
EPSS-0.23% / 13.45%
||
7 Day CHG~0.00%
Published-21 Apr, 2026 | 12:41
Updated-26 May, 2026 | 17:52
Rejected-Not Available
Known To Be Used In Ransomware Campaigns?-Not Available
KEV Added-Not Available
KEV Action Due Date-Not Available
Privilege escalation in the Debugger component

Privilege escalation in the Debugger component. This vulnerability was fixed in Firefox 150, Firefox ESR 140.10, Thunderbird 150, and Thunderbird 140.10.

Action-Not Available
Vendor-Mozilla Corporation
Product-thunderbirdfirefoxFirefoxThunderbird
CWE ID-CWE-269
Improper Privilege Management
CVE-2026-6761
Matching Score-8
Assigner-Mozilla Corporation
ShareView Details
Matching Score-8
Assigner-Mozilla Corporation
CVSS Score-8.8||HIGH
EPSS-0.22% / 12.82%
||
7 Day CHG~0.00%
Published-21 Apr, 2026 | 12:40
Updated-27 May, 2026 | 17:06
Rejected-Not Available
Known To Be Used In Ransomware Campaigns?-Not Available
KEV Added-Not Available
KEV Action Due Date-Not Available
Privilege escalation in the Networking component

Privilege escalation in the Networking component. This vulnerability was fixed in Firefox 150, Firefox ESR 140.10, Thunderbird 150, and Thunderbird 140.10.

Action-Not Available
Vendor-Mozilla Corporation
Product-thunderbirdfirefoxFirefoxThunderbird
CWE ID-CWE-269
Improper Privilege Management
CVE-2014-1522
Matching Score-8
Assigner-Mozilla Corporation
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Matching Score-8
Assigner-Mozilla Corporation
CVSS Score-9.3||HIGH
EPSS-5.42% / 91.86%
||
7 Day CHG~0.00%
Published-30 Apr, 2014 | 10:00
Updated-06 May, 2026 | 22:30
Rejected-Not Available
Known To Be Used In Ransomware Campaigns?-Not Available
KEV Added-Not Available
KEV Action Due Date-Not Available

The mozilla::dom::OscillatorNodeEngine::ComputeCustom function in the Web Audio subsystem in Mozilla Firefox before 29.0 and SeaMonkey before 2.26 allows remote attackers to execute arbitrary code or cause a denial of service (out-of-bounds read, memory corruption, and application crash) via crafted content.

Action-Not Available
Vendor-n/aCanonical Ltd.openSUSEMozilla CorporationFedora Project
Product-firefoxubuntu_linuxseamonkeyfedoraopensusen/a
CWE ID-CWE-125
Out-of-bounds Read
CVE-2019-5052
Matching Score-8
Assigner-Talos
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Matching Score-8
Assigner-Talos
CVSS Score-8.8||HIGH
EPSS-4.52% / 90.53%
||
7 Day CHG~0.00%
Published-03 Jul, 2019 | 18:43
Updated-04 Aug, 2024 | 19:47
Rejected-Not Available
Known To Be Used In Ransomware Campaigns?-Not Available
KEV Added-Not Available
KEV Action Due Date-Not Available

An exploitable integer overflow vulnerability exists when loading a PCX file in SDL2_image 2.0.4. A specially crafted file can cause an integer overflow, resulting in too little memory being allocated, which can lead to a buffer overflow and potential code execution. An attacker can provide a specially crafted image file to trigger this vulnerability.

Action-Not Available
Vendor-libsdln/aCanonical Ltd.openSUSEDebian GNU/Linux
Product-ubuntu_linuxsdl2_imagedebian_linuxbackports_sleleapSimple DirectMedia
CWE ID-CWE-190
Integer Overflow or Wraparound
CVE-2020-10531
Matching Score-8
Assigner-MITRE Corporation
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Matching Score-8
Assigner-MITRE Corporation
CVSS Score-8.8||HIGH
EPSS-2.67% / 84.17%
||
7 Day CHG~0.00%
Published-12 Mar, 2020 | 18:09
Updated-04 Aug, 2024 | 11:06
Rejected-Not Available
Known To Be Used In Ransomware Campaigns?-Not Available
KEV Added-Not Available
KEV Action Due Date-Not Available

An issue was discovered in International Components for Unicode (ICU) for C/C++ through 66.1. An integer overflow, leading to a heap-based buffer overflow, exists in the UnicodeString::doAppend() function in common/unistr.cpp.

Action-Not Available
Vendor-icu-projectn/aCanonical Ltd.Node.js (OpenJS Foundation)Google LLCRed Hat, Inc.openSUSEFedora ProjectDebian GNU/LinuxOracle Corporation
Product-enterprise_linux_serverubuntu_linuxdebian_linuxchromeenterprise_linux_workstationfedorainternational_components_for_unicodebanking_extensibility_workbenchenterprise_linux_desktopnode.jsleapn/a
CWE ID-CWE-787
Out-of-bounds Write
CWE ID-CWE-190
Integer Overflow or Wraparound
CVE-2021-38501
Matching Score-8
Assigner-Mozilla Corporation
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Matching Score-8
Assigner-Mozilla Corporation
CVSS Score-8.8||HIGH
EPSS-1.01% / 59.68%
||
7 Day CHG~0.00%
Published-03 Nov, 2021 | 00:02
Updated-04 Aug, 2024 | 01:44
Rejected-Not Available
Known To Be Used In Ransomware Campaigns?-Not Available
KEV Added-Not Available
KEV Action Due Date-Not Available

Mozilla developers reported memory safety bugs present in Firefox 92 and Firefox ESR 91.1. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. This vulnerability affects Firefox < 93, Thunderbird < 91.2, and Firefox ESR < 91.2.

Action-Not Available
Vendor-Mozilla Corporation
Product-firefoxthunderbirdfirefox_esrFirefoxFirefox ESRThunderbird
CVE-2021-38504
Matching Score-8
Assigner-Mozilla Corporation
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Matching Score-8
Assigner-Mozilla Corporation
CVSS Score-8.8||HIGH
EPSS-1.59% / 73.05%
||
7 Day CHG~0.00%
Published-08 Dec, 2021 | 21:21
Updated-04 Aug, 2024 | 01:44
Rejected-Not Available
Known To Be Used In Ransomware Campaigns?-Not Available
KEV Added-Not Available
KEV Action Due Date-Not Available

When interacting with an HTML input element's file picker dialog with webkitdirectory set, a use-after-free could have resulted, leading to memory corruption and a potentially exploitable crash. This vulnerability affects Firefox < 94, Thunderbird < 91.3, and Firefox ESR < 91.3.

Action-Not Available
Vendor-Debian GNU/LinuxMozilla Corporation
Product-firefoxthunderbirddebian_linuxfirefox_esrFirefoxFirefox ESRThunderbird
CWE ID-CWE-416
Use After Free
CVE-2019-9656
Matching Score-8
Assigner-MITRE Corporation
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Matching Score-8
Assigner-MITRE Corporation
CVSS Score-8.8||HIGH
EPSS-2.14% / 80.14%
||
7 Day CHG~0.00%
Published-11 Mar, 2019 | 04:00
Updated-04 Aug, 2024 | 21:54
Rejected-Not Available
Known To Be Used In Ransomware Campaigns?-Not Available
KEV Added-Not Available
KEV Action Due Date-Not Available

An issue was discovered in LibOFX 0.9.14. There is a NULL pointer dereference in the function OFXApplication::startElement in the file lib/ofx_sgml.cpp, as demonstrated by ofxdump.

Action-Not Available
Vendor-libofx_projectn/aCanonical Ltd.Debian GNU/Linux
Product-libofxubuntu_linuxdebian_linuxn/a
CWE ID-CWE-476
NULL Pointer Dereference
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