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Vulnerability Details :

CVE-2026-7324

Summary
Assigner-mozilla
Assigner Org ID-f16b083a-5664-49f3-a51e-8d479e5ed7fe
Published At-28 Apr, 2026 | 13:49
Updated At-30 Apr, 2026 | 17:19
Rejected At-
Credits

Memory safety bugs fixed in Thunderbird 150.0.1

Memory safety bugs present in Thunderbird 150.0.0. 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 150.0.1 and Thunderbird 150.0.1.

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)
â–¼Common Vulnerabilities and Exposures (CVE)
cve.org
Assigner:mozilla
Assigner Org ID:f16b083a-5664-49f3-a51e-8d479e5ed7fe
Published At:28 Apr, 2026 | 13:49
Updated At:30 Apr, 2026 | 17:19
Rejected At:
â–¼CVE Numbering Authority (CNA)
Memory safety bugs fixed in Thunderbird 150.0.1

Memory safety bugs present in Thunderbird 150.0.0. 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 150.0.1 and Thunderbird 150.0.1.

Affected Products
Vendor
Mozilla CorporationMozilla
Product
Firefox
Versions
Unaffected
  • From 150.0.1 through * (rpm)
Vendor
Mozilla CorporationMozilla
Product
Thunderbird
Versions
Unaffected
  • From 150.0.1 through * (rpm)
Metrics
VersionBase scoreBase severityVector
Metrics Other Info
Impacts
CAPEC IDDescription
Solutions

Configurations

Workarounds

Exploits

Credits

The Mozilla Fuzzing Team
Timeline
EventDate
Replaced By

Rejected Reason

References
HyperlinkResource
https://bugzilla.mozilla.org/buglist.cgi?bug_id=2029419%2C2029717%2C2029769%2C2029886
N/A
https://www.mozilla.org/security/advisories/mfsa2026-35/
N/A
https://www.mozilla.org/security/advisories/mfsa2026-38/
N/A
Hyperlink: https://bugzilla.mozilla.org/buglist.cgi?bug_id=2029419%2C2029717%2C2029769%2C2029886
Resource: N/A
Hyperlink: https://www.mozilla.org/security/advisories/mfsa2026-35/
Resource: N/A
Hyperlink: https://www.mozilla.org/security/advisories/mfsa2026-38/
Resource: N/A
â–¼Authorized Data Publishers (ADP)
CISA ADP Vulnrichment
Affected Products
Problem Types
TypeCWE IDDescription
CWECWE-119CWE-119 Improper Restriction of Operations within the Bounds of a Memory Buffer
Type: CWE
CWE ID: CWE-119
Description: CWE-119 Improper Restriction of Operations within the Bounds of a Memory Buffer
Metrics
VersionBase scoreBase severityVector
3.17.3HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
Version: 3.1
Base score: 7.3
Base severity: HIGH
Vector:
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
Metrics Other Info
Impacts
CAPEC IDDescription
Solutions

Configurations

Workarounds

Exploits

Credits

Timeline
EventDate
Replaced By

Rejected Reason

References
HyperlinkResource
Information is not available yet
â–¼National Vulnerability Database (NVD)
nvd.nist.gov
Source:security@mozilla.org
Published At:28 Apr, 2026 | 15:16
Updated At:30 Apr, 2026 | 18:16

Memory safety bugs present in Thunderbird 150.0.0. 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 150.0.1 and Thunderbird 150.0.1.

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
Secondary3.17.3HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
Type: Secondary
Version: 3.1
Base score: 7.3
Base severity: HIGH
Vector:
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
CPE Matches

Weaknesses
CWE IDTypeSource
CWE-119Secondary134c704f-9b21-4f2e-91b3-4a467353bcc0
CWE ID: CWE-119
Type: Secondary
Source: 134c704f-9b21-4f2e-91b3-4a467353bcc0
Evaluator Description

Evaluator Impact

Evaluator Solution

Vendor Statements

References
HyperlinkSourceResource
https://bugzilla.mozilla.org/buglist.cgi?bug_id=2029419%2C2029717%2C2029769%2C2029886security@mozilla.org
N/A
https://www.mozilla.org/security/advisories/mfsa2026-35/security@mozilla.org
N/A
https://www.mozilla.org/security/advisories/mfsa2026-38/security@mozilla.org
N/A
Hyperlink: https://bugzilla.mozilla.org/buglist.cgi?bug_id=2029419%2C2029717%2C2029769%2C2029886
Source: security@mozilla.org
Resource: N/A
Hyperlink: https://www.mozilla.org/security/advisories/mfsa2026-35/
Source: security@mozilla.org
Resource: N/A
Hyperlink: https://www.mozilla.org/security/advisories/mfsa2026-38/
Source: security@mozilla.org
Resource: N/A

Change History

0
Information is not available yet

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Rejected-Not Available
Known To Be Used In Ransomware Campaigns?-Not Available
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Action-Not Available
Vendor-Mozilla Corporation
Product-thunderbirdfirefoxFirefoxThunderbird
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Matching Score-6
Assigner-Mozilla Corporation
ShareView Details
Matching Score-6
Assigner-Mozilla Corporation
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EPSS-0.05% / 15.04%
||
7 Day CHG+0.02%
Published-28 Apr, 2026 | 13:49
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Rejected-Not Available
Known To Be Used In Ransomware Campaigns?-Not Available
KEV Added-Not Available
KEV Action Due Date-Not Available
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Action-Not Available
Vendor-Mozilla Corporation
Product-thunderbirdfirefoxFirefoxThunderbird
CWE ID-CWE-119
Improper Restriction of Operations within the Bounds of a Memory Buffer
CVE-2026-6779
Matching Score-6
Assigner-Mozilla Corporation
ShareView Details
Matching Score-6
Assigner-Mozilla Corporation
CVSS Score-5.3||MEDIUM
EPSS-0.10% / 26.20%
||
7 Day CHG~0.00%
Published-21 Apr, 2026 | 12:41
Updated-22 Apr, 2026 | 15:18
Rejected-Not Available
Known To Be Used In Ransomware Campaigns?-Not Available
KEV Added-Not Available
KEV Action Due Date-Not Available
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Action-Not Available
Vendor-Mozilla Corporation
Product-thunderbirdfirefoxFirefoxThunderbird
CWE ID-CWE-119
Improper Restriction of Operations within the Bounds of a Memory Buffer
CWE ID-CWE-20
Improper Input Validation
CWE ID-CWE-79
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
CVE-2026-6775
Matching Score-6
Assigner-Mozilla Corporation
ShareView Details
Matching Score-6
Assigner-Mozilla Corporation
CVSS Score-5.3||MEDIUM
EPSS-0.04% / 11.09%
||
7 Day CHG~0.00%
Published-21 Apr, 2026 | 12:41
Updated-22 Apr, 2026 | 15:17
Rejected-Not Available
Known To Be Used In Ransomware Campaigns?-Not Available
KEV Added-Not Available
KEV Action Due Date-Not Available
Incorrect boundary conditions in the WebRTC component

Incorrect boundary conditions in the WebRTC component. This vulnerability was fixed in Firefox 150 and Thunderbird 150.

Action-Not Available
Vendor-Mozilla Corporation
Product-thunderbirdfirefoxFirefoxThunderbird
CWE ID-CWE-119
Improper Restriction of Operations within the Bounds of a Memory Buffer
CVE-2026-6776
Matching Score-6
Assigner-Mozilla Corporation
ShareView Details
Matching Score-6
Assigner-Mozilla Corporation
CVSS Score-7.8||HIGH
EPSS-0.01% / 2.14%
||
7 Day CHG~0.00%
Published-21 Apr, 2026 | 12:41
Updated-22 Apr, 2026 | 15:07
Rejected-Not Available
Known To Be Used In Ransomware Campaigns?-Not Available
KEV Added-Not Available
KEV Action Due Date-Not Available
Incorrect boundary conditions in the WebRTC: Networking component

Incorrect boundary conditions in the WebRTC: 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-119
Improper Restriction of Operations within the Bounds of a Memory Buffer
CVE-2026-5731
Matching Score-6
Assigner-Mozilla Corporation
ShareView Details
Matching Score-6
Assigner-Mozilla Corporation
CVSS Score-9.8||CRITICAL
EPSS-0.07% / 19.92%
||
7 Day CHG~0.00%
Published-07 Apr, 2026 | 12:43
Updated-16 Apr, 2026 | 18:59
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 115.34.1, Firefox ESR 140.9.1, Thunderbird ESR 140.9.1, Firefox 149.0.2 and Thunderbird 149.0.2

Memory safety bugs present in Firefox ESR 115.34.0, Firefox ESR 140.9.0, Thunderbird ESR 140.9.0, Firefox 149.0.1 and Thunderbird 149.0.1. 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 was fixed in Firefox 149.0.2, Firefox ESR 115.34.1, Firefox ESR 140.9.1, Thunderbird 149.0.2, and Thunderbird 140.9.1.

Action-Not Available
Vendor-Mozilla Corporation
Product-firefoxthunderbirdThunderbirdFirefox
CWE ID-CWE-119
Improper Restriction of Operations within the Bounds of a Memory Buffer
CVE-2026-5733
Matching Score-6
Assigner-Mozilla Corporation
ShareView Details
Matching Score-6
Assigner-Mozilla Corporation
CVSS Score-8.8||HIGH
EPSS-0.04% / 11.64%
||
7 Day CHG~0.00%
Published-07 Apr, 2026 | 12:43
Updated-13 Apr, 2026 | 15:17
Rejected-Not Available
Known To Be Used In Ransomware Campaigns?-Not Available
KEV Added-Not Available
KEV Action Due Date-Not Available
Incorrect boundary conditions in the Graphics: WebGPU component

Incorrect boundary conditions in the Graphics: WebGPU component. This vulnerability was fixed in Firefox 149.0.2 and Thunderbird 149.0.2.

Action-Not Available
Vendor-Mozilla Corporation
Product-firefoxThunderbirdFirefox
CWE ID-CWE-119
Improper Restriction of Operations within the Bounds of a Memory Buffer
CVE-2026-3847
Matching Score-6
Assigner-Mozilla Corporation
ShareView Details
Matching Score-6
Assigner-Mozilla Corporation
CVSS Score-8.8||HIGH
EPSS-0.05% / 14.84%
||
7 Day CHG~0.00%
Published-10 Mar, 2026 | 15:03
Updated-13 Apr, 2026 | 15:17
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 148.0.2

Memory safety bugs present in Firefox 148.0.2. 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 148.0.2.

Action-Not Available
Vendor-Mozilla Corporation
Product-firefoxFirefox
CWE ID-CWE-119
Improper Restriction of Operations within the Bounds of a Memory Buffer
CWE ID-CWE-416
Use After Free
CVE-2026-6764
Matching Score-6
Assigner-Mozilla Corporation
ShareView Details
Matching Score-6
Assigner-Mozilla Corporation
CVSS Score-6.5||MEDIUM
EPSS-0.06% / 17.85%
||
7 Day CHG~0.00%
Published-21 Apr, 2026 | 12:40
Updated-22 Apr, 2026 | 16:07
Rejected-Not Available
Known To Be Used In Ransomware Campaigns?-Not Available
KEV Added-Not Available
KEV Action Due Date-Not Available
Incorrect boundary conditions in the DOM: Device Interfaces component

Incorrect boundary conditions in the DOM: Device Interfaces 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-119
Improper Restriction of Operations within the Bounds of a Memory Buffer
CVE-2022-31740
Matching Score-6
Assigner-Mozilla Corporation
ShareView Details
Matching Score-6
Assigner-Mozilla Corporation
CVSS Score-8.8||HIGH
EPSS-0.26% / 49.18%
||
7 Day CHG~0.00%
Published-22 Dec, 2022 | 00:00
Updated-16 Apr, 2025 | 14:15
Rejected-Not Available
Known To Be Used In Ransomware Campaigns?-Not Available
KEV Added-Not Available
KEV Action Due Date-Not Available

On arm64, WASM code could have resulted in incorrect assembly generation leading to a register allocation problem, and a potentially exploitable crash. This vulnerability affects Thunderbird < 91.10, Firefox < 101, and Firefox ESR < 91.10.

Action-Not Available
Vendor-Mozilla Corporation
Product-thunderbirdfirefox_esrfirefoxFirefox ESRFirefoxThunderbird
CWE ID-CWE-119
Improper Restriction of Operations within the Bounds of a Memory Buffer
CVE-2022-31748
Matching Score-6
Assigner-Mozilla Corporation
ShareView Details
Matching Score-6
Assigner-Mozilla Corporation
CVSS Score-9.8||CRITICAL
EPSS-0.56% / 68.41%
||
7 Day CHG~0.00%
Published-22 Dec, 2022 | 00:00
Updated-15 Apr, 2025 | 19:15
Rejected-Not Available
Known To Be Used In Ransomware Campaigns?-Not Available
KEV Added-Not Available
KEV Action Due Date-Not Available

Mozilla developers Gabriele Svelto, Timothy Nikkel, Randell Jesup, Jon Coppeard, and the Mozilla Fuzzing Team reported memory safety bugs present in Firefox 100. 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 < 101.

Action-Not Available
Vendor-Mozilla Corporation
Product-firefoxFirefox
CWE ID-CWE-119
Improper Restriction of Operations within the Bounds of a Memory Buffer
CVE-2022-31747
Matching Score-6
Assigner-Mozilla Corporation
ShareView Details
Matching Score-6
Assigner-Mozilla Corporation
CVSS Score-9.8||CRITICAL
EPSS-0.66% / 71.11%
||
7 Day CHG~0.00%
Published-22 Dec, 2022 | 00:00
Updated-15 Apr, 2025 | 19:15
Rejected-Not Available
Known To Be Used In Ransomware Campaigns?-Not Available
KEV Added-Not Available
KEV Action Due Date-Not Available

Mozilla developers Andrew McCreight, Nicolas B. Pierron, and the Mozilla Fuzzing Team reported memory safety bugs present in Firefox 100 and Firefox ESR 91.9. 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 < 91.10, Firefox < 101, and Firefox ESR < 91.10.

Action-Not Available
Vendor-Mozilla Corporation
Product-firefox_esrthunderbirdfirefoxThunderbirdFirefox ESRFirefox
CWE ID-CWE-119
Improper Restriction of Operations within the Bounds of a Memory Buffer
CWE ID-CWE-125
Out-of-bounds Read
CWE ID-CWE-416
Use After Free
CWE ID-CWE-787
Out-of-bounds Write
CVE-2025-14861
Matching Score-6
Assigner-Mozilla Corporation
ShareView Details
Matching Score-6
Assigner-Mozilla Corporation
CVSS Score-8.8||HIGH
EPSS-0.08% / 23.24%
||
7 Day CHG~0.00%
Published-18 Dec, 2025 | 14:21
Updated-13 Apr, 2026 | 15:16
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 146.0.1

Memory safety bugs present in Firefox 146. 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 146.0.1.

Action-Not Available
Vendor-Mozilla Corporation
Product-firefoxFirefox
CWE ID-CWE-119
Improper Restriction of Operations within the Bounds of a Memory Buffer
CVE-2025-14330
Matching Score-6
Assigner-Mozilla Corporation
ShareView Details
Matching Score-6
Assigner-Mozilla Corporation
CVSS Score-9.8||CRITICAL
EPSS-0.09% / 25.16%
||
7 Day CHG~0.00%
Published-09 Dec, 2025 | 13:38
Updated-13 Apr, 2026 | 15:16
Rejected-Not Available
Known To Be Used In Ransomware Campaigns?-Not Available
KEV Added-Not Available
KEV Action Due Date-Not Available
JIT miscompilation in the JavaScript Engine: JIT component

JIT miscompilation in the JavaScript Engine: JIT component. This vulnerability was fixed in Firefox 146, Firefox ESR 140.6, Thunderbird 146, and Thunderbird 140.6.

Action-Not Available
Vendor-Mozilla Corporation
Product-firefoxthunderbirdThunderbirdFirefox
CWE ID-CWE-119
Improper Restriction of Operations within the Bounds of a Memory Buffer
CWE ID-CWE-686
Function Call With Incorrect Argument Type
CWE ID-CWE-843
Access of Resource Using Incompatible Type ('Type Confusion')
CVE-2025-14333
Matching Score-6
Assigner-Mozilla Corporation
ShareView Details
Matching Score-6
Assigner-Mozilla Corporation
CVSS Score-8.1||HIGH
EPSS-0.09% / 24.57%
||
7 Day CHG~0.00%
Published-09 Dec, 2025 | 13:38
Updated-13 Apr, 2026 | 15:16
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 140.6, Thunderbird ESR 140.6, Firefox 146 and Thunderbird 146

Memory safety bugs present in Firefox ESR 140.5, Thunderbird ESR 140.5, Firefox 145 and Thunderbird 145. 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 146, Firefox ESR 140.6, Thunderbird 146, and Thunderbird 140.6.

Action-Not Available
Vendor-Mozilla Corporation
Product-firefoxthunderbirdThunderbirdFirefox
CWE ID-CWE-119
Improper Restriction of Operations within the Bounds of a Memory Buffer
CWE ID-CWE-787
Out-of-bounds Write
CVE-2026-4710
Matching Score-6
Assigner-Mozilla Corporation
ShareView Details
Matching Score-6
Assigner-Mozilla Corporation
CVSS Score-9.8||CRITICAL
EPSS-0.03% / 6.92%
||
7 Day CHG~0.00%
Published-24 Mar, 2026 | 12:30
Updated-13 Apr, 2026 | 15:17
Rejected-Not Available
Known To Be Used In Ransomware Campaigns?-Not Available
KEV Added-Not Available
KEV Action Due Date-Not Available
Incorrect boundary conditions in the Audio/Video component

Incorrect boundary conditions in the Audio/Video component. This vulnerability was fixed in Firefox 149, Firefox ESR 140.9, Thunderbird 149, and Thunderbird 140.9.

Action-Not Available
Vendor-Mozilla Corporation
Product-firefoxthunderbirdThunderbirdFirefox
CWE ID-CWE-119
Improper Restriction of Operations within the Bounds of a Memory Buffer
CVE-2026-4719
Matching Score-6
Assigner-Mozilla Corporation
ShareView Details
Matching Score-6
Assigner-Mozilla Corporation
CVSS Score-7.5||HIGH
EPSS-0.02% / 6.05%
||
7 Day CHG~0.00%
Published-24 Mar, 2026 | 12:30
Updated-13 Apr, 2026 | 15:17
Rejected-Not Available
Known To Be Used In Ransomware Campaigns?-Not Available
KEV Added-Not Available
KEV Action Due Date-Not Available
Incorrect boundary conditions in the Graphics: Text component

Incorrect boundary conditions in the Graphics: Text component. This vulnerability was fixed in Firefox 149, Firefox ESR 140.9, Thunderbird 149, and Thunderbird 140.9.

Action-Not Available
Vendor-Mozilla Corporation
Product-firefoxThunderbirdFirefox
CWE ID-CWE-119
Improper Restriction of Operations within the Bounds of a Memory Buffer
CWE ID-CWE-754
Improper Check for Unusual or Exceptional Conditions
CVE-2025-13027
Matching Score-6
Assigner-Mozilla Corporation
ShareView Details
Matching Score-6
Assigner-Mozilla Corporation
CVSS Score-8.1||HIGH
EPSS-0.05% / 16.10%
||
7 Day CHG~0.00%
Published-11 Nov, 2025 | 15:47
Updated-13 Apr, 2026 | 15:16
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 145 and Thunderbird 145

Memory safety bugs present in Firefox 144 and Thunderbird 144. 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 145 and Thunderbird 145.

Action-Not Available
Vendor-Mozilla Corporation
Product-firefoxThunderbirdFirefox
CWE ID-CWE-119
Improper Restriction of Operations within the Bounds of a Memory Buffer
CVE-2026-2773
Matching Score-6
Assigner-Mozilla Corporation
ShareView Details
Matching Score-6
Assigner-Mozilla Corporation
CVSS Score-9.8||CRITICAL
EPSS-0.03% / 8.26%
||
7 Day CHG~0.00%
Published-24 Feb, 2026 | 13:33
Updated-16 Apr, 2026 | 14:31
Rejected-Not Available
Known To Be Used In Ransomware Campaigns?-Not Available
KEV Added-Not Available
KEV Action Due Date-Not Available
Incorrect boundary conditions in the Web Audio component

Incorrect boundary conditions in the Web Audio component. This vulnerability was fixed in Firefox 148, Firefox ESR 115.33, Firefox ESR 140.8, Thunderbird 148, and Thunderbird 140.8.

Action-Not Available
Vendor-Mozilla Corporation
Product-firefoxthunderbirdThunderbirdFirefox
CWE ID-CWE-119
Improper Restriction of Operations within the Bounds of a Memory Buffer
CVE-2018-5094
Matching Score-6
Assigner-Mozilla Corporation
ShareView Details
Matching Score-6
Assigner-Mozilla Corporation
CVSS Score-7.5||HIGH
EPSS-35.43% / 97.08%
||
7 Day CHG~0.00%
Published-11 Jun, 2018 | 21:00
Updated-05 Aug, 2024 | 05:26
Rejected-Not Available
Known To Be Used In Ransomware Campaigns?-Not Available
KEV Added-Not Available
KEV Action Due Date-Not Available

A heap buffer overflow vulnerability may occur in WebAssembly when "shrinkElements" is called followed by garbage collection on memory that is now uninitialized. This results in a potentially exploitable crash. This vulnerability affects Firefox < 58.

Action-Not Available
Vendor-Mozilla CorporationCanonical Ltd.
Product-firefoxubuntu_linuxFirefox
CWE ID-CWE-119
Improper Restriction of Operations within the Bounds of a Memory Buffer
CVE-2018-5093
Matching Score-6
Assigner-Mozilla Corporation
ShareView Details
Matching Score-6
Assigner-Mozilla Corporation
CVSS Score-7.5||HIGH
EPSS-21.88% / 95.79%
||
7 Day CHG~0.00%
Published-11 Jun, 2018 | 21:00
Updated-05 Aug, 2024 | 05:26
Rejected-Not Available
Known To Be Used In Ransomware Campaigns?-Not Available
KEV Added-Not Available
KEV Action Due Date-Not Available

A heap buffer overflow vulnerability may occur in WebAssembly during Memory/Table resizing, resulting in a potentially exploitable crash. This vulnerability affects Firefox < 58.

Action-Not Available
Vendor-Mozilla CorporationCanonical Ltd.
Product-firefoxubuntu_linuxFirefox
CWE ID-CWE-119
Improper Restriction of Operations within the Bounds of a Memory Buffer
CVE-2018-5178
Matching Score-6
Assigner-Mozilla Corporation
ShareView Details
Matching Score-6
Assigner-Mozilla Corporation
CVSS Score-8.1||HIGH
EPSS-18.16% / 95.22%
||
7 Day CHG~0.00%
Published-11 Jun, 2018 | 21:00
Updated-25 Nov, 2025 | 17:50
Rejected-Not Available
Known To Be Used In Ransomware Campaigns?-Not Available
KEV Added-Not Available
KEV Action Due Date-Not Available

A buffer overflow was found during UTF8 to Unicode string conversion within JavaScript with extremely large amounts of data. This vulnerability requires the use of a malicious or vulnerable legacy extension in order to occur. This vulnerability affects Thunderbird ESR < 52.8, Thunderbird < 52.8, and Firefox ESR < 52.8.

Action-Not Available
Vendor-Mozilla CorporationCanonical Ltd.Debian GNU/LinuxRed Hat, Inc.
Product-thunderbird_esrthunderbirdenterprise_linux_server_tusfirefoxubuntu_linuxenterprise_linux_desktopenterprise_linux_serverdebian_linuxenterprise_linux_server_eusenterprise_linux_workstationenterprise_linux_server_ausThunderbird ESRFirefox ESRThunderbird
CWE ID-CWE-119
Improper Restriction of Operations within the Bounds of a Memory Buffer
CVE-2026-2778
Matching Score-6
Assigner-Mozilla Corporation
ShareView Details
Matching Score-6
Assigner-Mozilla Corporation
CVSS Score-10||CRITICAL
EPSS-0.03% / 8.07%
||
7 Day CHG~0.00%
Published-24 Feb, 2026 | 13:33
Updated-16 Apr, 2026 | 14:32
Rejected-Not Available
Known To Be Used In Ransomware Campaigns?-Not Available
KEV Added-Not Available
KEV Action Due Date-Not Available
Sandbox escape due to incorrect boundary conditions in the DOM: Core & HTML component

Sandbox escape due to incorrect boundary conditions in the DOM: Core & HTML component. This vulnerability was fixed in Firefox 148, Firefox ESR 115.33, Firefox ESR 140.8, Thunderbird 148, and Thunderbird 140.8.

Action-Not Available
Vendor-Mozilla Corporation
Product-firefoxthunderbirdThunderbirdFirefox
CWE ID-CWE-119
Improper Restriction of Operations within the Bounds of a Memory Buffer
CVE-2018-5186
Matching Score-6
Assigner-Mozilla Corporation
ShareView Details
Matching Score-6
Assigner-Mozilla Corporation
CVSS Score-9.8||CRITICAL
EPSS-1.62% / 81.91%
||
7 Day CHG-0.09%
Published-18 Oct, 2018 | 13:00
Updated-05 Aug, 2024 | 05:26
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 present in Firefox 60. Some of these bugs showed evidence of memory corruption and we presume that with enough effort that some of these could be exploited to run arbitrary code. This vulnerability affects Firefox < 61.

Action-Not Available
Vendor-Mozilla CorporationCanonical Ltd.
Product-firefoxubuntu_linuxFirefox
CWE ID-CWE-119
Improper Restriction of Operations within the Bounds of a Memory Buffer
CVE-2018-5145
Matching Score-6
Assigner-Mozilla Corporation
ShareView Details
Matching Score-6
Assigner-Mozilla Corporation
CVSS Score-9.8||CRITICAL
EPSS-2.02% / 83.84%
||
7 Day CHG~0.00%
Published-11 Jun, 2018 | 21:00
Updated-25 Nov, 2025 | 17:50
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 were reported in Firefox ESR 52.6. These bugs showed evidence of memory corruption and we presume that with enough effort that some of these could be exploited to run arbitrary code. This vulnerability affects Firefox ESR < 52.7 and Thunderbird < 52.7.

Action-Not Available
Vendor-Mozilla CorporationCanonical Ltd.Debian GNU/LinuxRed Hat, Inc.
Product-thunderbirdenterprise_linux_server_tusfirefoxubuntu_linuxenterprise_linux_desktopenterprise_linux_server_eusenterprise_linux_serverdebian_linuxenterprise_linux_workstationenterprise_linux_server_ausThunderbirdFirefox ESR
CWE ID-CWE-119
Improper Restriction of Operations within the Bounds of a Memory Buffer
CVE-2018-5127
Matching Score-6
Assigner-Mozilla Corporation
ShareView Details
Matching Score-6
Assigner-Mozilla Corporation
CVSS Score-8.8||HIGH
EPSS-20.18% / 95.53%
||
7 Day CHG~0.00%
Published-11 Jun, 2018 | 21:00
Updated-25 Nov, 2025 | 17:50
Rejected-Not Available
Known To Be Used In Ransomware Campaigns?-Not Available
KEV Added-Not Available
KEV Action Due Date-Not Available

A buffer overflow can occur when manipulating the SVG "animatedPathSegList" through script. This results in a potentially exploitable crash. This vulnerability affects Thunderbird < 52.7, Firefox ESR < 52.7, and Firefox < 59.

Action-Not Available
Vendor-Mozilla CorporationCanonical Ltd.Debian GNU/LinuxRed Hat, Inc.
Product-thunderbirdfirefoxubuntu_linuxenterprise_linux_desktopenterprise_linux_server_eusenterprise_linux_serverdebian_linuxenterprise_linux_workstationenterprise_linux_server_ausThunderbirdFirefox ESRFirefox
CWE ID-CWE-119
Improper Restriction of Operations within the Bounds of a Memory Buffer
CVE-2018-5126
Matching Score-6
Assigner-Mozilla Corporation
ShareView Details
Matching Score-6
Assigner-Mozilla Corporation
CVSS Score-9.8||CRITICAL
EPSS-2.04% / 83.94%
||
7 Day CHG~0.00%
Published-11 Jun, 2018 | 21:00
Updated-05 Aug, 2024 | 05:26
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 were reported in Firefox 58. Some of these bugs showed evidence of memory corruption and we presume that with enough effort that some of these could be exploited to run arbitrary code. This vulnerability affects Firefox < 59.

Action-Not Available
Vendor-Mozilla CorporationCanonical Ltd.
Product-firefoxubuntu_linuxFirefox
CWE ID-CWE-119
Improper Restriction of Operations within the Bounds of a Memory Buffer
CVE-2018-5090
Matching Score-6
Assigner-Mozilla Corporation
ShareView Details
Matching Score-6
Assigner-Mozilla Corporation
CVSS Score-9.8||CRITICAL
EPSS-2.03% / 83.88%
||
7 Day CHG~0.00%
Published-11 Jun, 2018 | 21:00
Updated-05 Aug, 2024 | 05:26
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 were reported in Firefox 57. Some of these bugs showed evidence of memory corruption and we presume that with enough effort that some of these could be exploited to run arbitrary code. This vulnerability affects Firefox < 58.

Action-Not Available
Vendor-Mozilla CorporationCanonical Ltd.
Product-firefoxubuntu_linuxFirefox
CWE ID-CWE-119
Improper Restriction of Operations within the Bounds of a Memory Buffer
CVE-2018-5187
Matching Score-6
Assigner-Mozilla Corporation
ShareView Details
Matching Score-6
Assigner-Mozilla Corporation
CVSS Score-9.8||CRITICAL
EPSS-2.22% / 84.58%
||
7 Day CHG-0.12%
Published-18 Oct, 2018 | 13:00
Updated-25 Nov, 2025 | 17:50
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 present in Firefox 60 and Firefox ESR 60. Some of these bugs showed evidence of memory corruption and we presume that with enough effort that some of these could be exploited to run arbitrary code. This vulnerability affects Thunderbird < 60, Firefox ESR < 60.1, and Firefox < 61.

Action-Not Available
Vendor-Mozilla CorporationCanonical Ltd.Debian GNU/Linux
Product-firefoxthunderbirddebian_linuxubuntu_linuxThunderbirdFirefox ESRFirefox
CWE ID-CWE-119
Improper Restriction of Operations within the Bounds of a Memory Buffer
CVE-2018-5188
Matching Score-6
Assigner-Mozilla Corporation
ShareView Details
Matching Score-6
Assigner-Mozilla Corporation
CVSS Score-9.8||CRITICAL
EPSS-4.71% / 89.42%
||
7 Day CHG-0.24%
Published-18 Oct, 2018 | 13:00
Updated-21 Oct, 2024 | 13:55
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 present in Firefox 60, Firefox ESR 60, and Firefox ESR 52.8. Some of these bugs showed evidence of memory corruption and we presume that with enough effort that some of these could be exploited to run arbitrary code. This vulnerability affects Thunderbird < 60, Thunderbird < 52.9, Firefox ESR < 60.1, Firefox ESR < 52.9, and Firefox < 61.

Action-Not Available
Vendor-Canonical Ltd.Red Hat, Inc.Mozilla CorporationDebian GNU/Linux
Product-enterprise_linux_serverubuntu_linuxdebian_linuxthunderbirdenterprise_linux_server_eusfirefoxfirefox_esrenterprise_linux_server_ausenterprise_linux_workstationenterprise_linux_server_tusenterprise_linux_desktopThunderbirdFirefox ESRFirefox
CWE ID-CWE-119
Improper Restriction of Operations within the Bounds of a Memory Buffer
CVE-2018-5125
Matching Score-6
Assigner-Mozilla Corporation
ShareView Details
Matching Score-6
Assigner-Mozilla Corporation
CVSS Score-8.8||HIGH
EPSS-1.07% / 77.83%
||
7 Day CHG~0.00%
Published-11 Jun, 2018 | 21:00
Updated-25 Nov, 2025 | 17:50
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 were reported in Firefox 58 and Firefox ESR 52.6. Some of these bugs showed evidence of memory corruption and we presume that with enough effort that some of these could be exploited to run arbitrary code. This vulnerability affects Thunderbird < 52.7, Firefox ESR < 52.7, and Firefox < 59.

Action-Not Available
Vendor-Mozilla CorporationCanonical Ltd.Debian GNU/LinuxRed Hat, Inc.
Product-thunderbirdfirefoxubuntu_linuxenterprise_linux_desktopenterprise_linux_serverdebian_linuxenterprise_linux_workstationThunderbirdFirefox ESRFirefox
CWE ID-CWE-119
Improper Restriction of Operations within the Bounds of a Memory Buffer
CVE-2018-5089
Matching Score-6
Assigner-Mozilla Corporation
ShareView Details
Matching Score-6
Assigner-Mozilla Corporation
CVSS Score-9.8||CRITICAL
EPSS-2.99% / 86.61%
||
7 Day CHG~0.00%
Published-11 Jun, 2018 | 21:00
Updated-25 Nov, 2025 | 17:50
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 were reported in Firefox 57 and Firefox ESR 52.5. Some of these bugs showed evidence of memory corruption and we presume that with enough effort that some of these could be exploited to run arbitrary code. This vulnerability affects Thunderbird < 52.6, Firefox ESR < 52.6, and Firefox < 58.

Action-Not Available
Vendor-Mozilla CorporationCanonical Ltd.Debian GNU/LinuxRed Hat, Inc.
Product-thunderbirdfirefoxubuntu_linuxenterprise_linux_desktopenterprise_linux_serverdebian_linuxenterprise_linux_workstationThunderbirdFirefox ESRFirefox
CWE ID-CWE-119
Improper Restriction of Operations within the Bounds of a Memory Buffer
CVE-2018-5150
Matching Score-6
Assigner-Mozilla Corporation
ShareView Details
Matching Score-6
Assigner-Mozilla Corporation
CVSS Score-9.8||CRITICAL
EPSS-3.92% / 88.35%
||
7 Day CHG~0.00%
Published-11 Jun, 2018 | 21:00
Updated-25 Nov, 2025 | 17:50
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 were reported in Firefox 59, Firefox ESR 52.7, and Thunderbird 52.7. Some of these bugs showed evidence of memory corruption and we presume that with enough effort that some of these could be exploited to run arbitrary code. This vulnerability affects Thunderbird < 52.8, Thunderbird ESR < 52.8, Firefox < 60, and Firefox ESR < 52.8.

Action-Not Available
Vendor-Mozilla CorporationCanonical Ltd.Debian GNU/LinuxRed Hat, Inc.
Product-thunderbirdenterprise_linux_server_tusthunderbird_esrfirefoxubuntu_linuxenterprise_linux_desktopenterprise_linux_server_eusenterprise_linux_serverdebian_linuxenterprise_linux_workstationenterprise_linux_server_ausThunderbirdThunderbird ESRFirefoxFirefox ESR
CWE ID-CWE-119
Improper Restriction of Operations within the Bounds of a Memory Buffer
CVE-2018-5183
Matching Score-6
Assigner-Mozilla Corporation
ShareView Details
Matching Score-6
Assigner-Mozilla Corporation
CVSS Score-9.8||CRITICAL
EPSS-3.92% / 88.35%
||
7 Day CHG~0.00%
Published-11 Jun, 2018 | 21:00
Updated-25 Nov, 2025 | 17:50
Rejected-Not Available
Known To Be Used In Ransomware Campaigns?-Not Available
KEV Added-Not Available
KEV Action Due Date-Not Available

Mozilla developers backported selected changes in the Skia library. These changes correct memory corruption issues including invalid buffer reads and writes during graphic operations. This vulnerability affects Thunderbird ESR < 52.8, Thunderbird < 52.8, and Firefox ESR < 52.8.

Action-Not Available
Vendor-Mozilla CorporationCanonical Ltd.Debian GNU/LinuxRed Hat, Inc.
Product-thunderbirdenterprise_linux_server_tusthunderbird_esrfirefoxubuntu_linuxenterprise_linux_desktopenterprise_linux_server_eusenterprise_linux_serverdebian_linuxenterprise_linux_workstationenterprise_linux_server_ausThunderbird ESRFirefox ESRThunderbird
CWE ID-CWE-119
Improper Restriction of Operations within the Bounds of a Memory Buffer
CVE-2018-5177
Matching Score-6
Assigner-Mozilla Corporation
ShareView Details
Matching Score-6
Assigner-Mozilla Corporation
CVSS Score-7.5||HIGH
EPSS-0.92% / 76.01%
||
7 Day CHG~0.00%
Published-11 Jun, 2018 | 21:00
Updated-05 Aug, 2024 | 05:26
Rejected-Not Available
Known To Be Used In Ransomware Campaigns?-Not Available
KEV Added-Not Available
KEV Action Due Date-Not Available

A vulnerability exists in XSLT during number formatting where a negative buffer size may be allocated in some instances, leading to a buffer overflow and crash if it occurs. This vulnerability affects Firefox < 60.

Action-Not Available
Vendor-Mozilla CorporationCanonical Ltd.
Product-firefoxubuntu_linuxFirefox
CWE ID-CWE-119
Improper Restriction of Operations within the Bounds of a Memory Buffer
CVE-2018-5151
Matching Score-6
Assigner-Mozilla Corporation
ShareView Details
Matching Score-6
Assigner-Mozilla Corporation
CVSS Score-9.8||CRITICAL
EPSS-2.74% / 86.05%
||
7 Day CHG~0.00%
Published-11 Jun, 2018 | 21:00
Updated-05 Aug, 2024 | 05:26
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 were reported in Firefox 59. Some of these bugs showed evidence of memory corruption and we presume that with enough effort that some of these could be exploited to run arbitrary code. This vulnerability affects Firefox < 60.

Action-Not Available
Vendor-Mozilla CorporationCanonical Ltd.
Product-firefoxubuntu_linuxFirefox
CWE ID-CWE-119
Improper Restriction of Operations within the Bounds of a Memory Buffer
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