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Vulnerability Details :

CVE-2026-16349

Summary
Assigner-mozilla
Assigner Org ID-f16b083a-5664-49f3-a51e-8d479e5ed7fe
Published At-21 Jul, 2026 | 12:37
Updated At-22 Jul, 2026 | 19:18
Rejected At-
Credits

Same-origin policy bypass in the DOM: Navigation component

Same-origin policy bypass in the DOM: Navigation component. This vulnerability was fixed in Firefox 153, Firefox ESR 115.38, Firefox ESR 140.13, Thunderbird 153, and Thunderbird 140.13.

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:21 Jul, 2026 | 12:37
Updated At:22 Jul, 2026 | 19:18
Rejected At:
â–¼CVE Numbering Authority (CNA)
Same-origin policy bypass in the DOM: Navigation component

Same-origin policy bypass in the DOM: Navigation component. This vulnerability was fixed in Firefox 153, Firefox ESR 115.38, Firefox ESR 140.13, Thunderbird 153, and Thunderbird 140.13.

Affected Products
Vendor
Mozilla CorporationMozilla
Product
Firefox
Versions
Unaffected
  • From 115.38 through 115.* (rpm)
  • From 140.13 through 140.* (rpm)
  • From 153 through * (rpm)
Vendor
Mozilla CorporationMozilla
Product
Thunderbird
Versions
Unaffected
  • From 140.13 through 140.* (rpm)
  • From 153 through * (rpm)
Metrics
VersionBase scoreBase severityVector
Metrics Other Info
Impacts
CAPEC IDDescription
Solutions

Configurations

Workarounds

Exploits

Credits

Tran Quac
Timeline
EventDate
Replaced By

Rejected Reason

References
HyperlinkResource
https://bugzilla.mozilla.org/show_bug.cgi?id=2034682
N/A
https://www.mozilla.org/security/advisories/mfsa2026-68/
N/A
https://www.mozilla.org/security/advisories/mfsa2026-69/
N/A
https://www.mozilla.org/security/advisories/mfsa2026-70/
N/A
https://www.mozilla.org/security/advisories/mfsa2026-71/
N/A
https://www.mozilla.org/security/advisories/mfsa2026-72/
N/A
Hyperlink: https://bugzilla.mozilla.org/show_bug.cgi?id=2034682
Resource: N/A
Hyperlink: https://www.mozilla.org/security/advisories/mfsa2026-68/
Resource: N/A
Hyperlink: https://www.mozilla.org/security/advisories/mfsa2026-69/
Resource: N/A
Hyperlink: https://www.mozilla.org/security/advisories/mfsa2026-70/
Resource: N/A
Hyperlink: https://www.mozilla.org/security/advisories/mfsa2026-71/
Resource: N/A
Hyperlink: https://www.mozilla.org/security/advisories/mfsa2026-72/
Resource: N/A
â–¼Authorized Data Publishers (ADP)
CISA ADP Vulnrichment
Affected Products
Problem Types
TypeCWE IDDescription
CWECWE-346CWE-346 Origin Validation Error
Type: CWE
CWE ID: CWE-346
Description: CWE-346 Origin Validation Error
Metrics
VersionBase scoreBase severityVector
3.19.8CRITICAL
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Version: 3.1
Base score: 9.8
Base severity: CRITICAL
Vector:
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
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:21 Jul, 2026 | 13:17
Updated At:24 Jul, 2026 | 15:43

Same-origin policy bypass in the DOM: Navigation component. This vulnerability was fixed in Firefox 153, Firefox ESR 115.38, Firefox ESR 140.13, Thunderbird 153, and Thunderbird 140.13.

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
Secondary3.19.8CRITICAL
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
N/A
Type: Secondary
Version: 3.1
Base score: 9.8
Base severity: CRITICAL
Vector:
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Type: N/A
Version:
Base score:
Base severity: N/A
Vector:
CPE Matches

Mozilla Corporation
mozilla
>>firefox>>Versions before 115.38.0(exclusive)
cpe:2.3:a:mozilla:firefox:*:*:*:*:esr:*:*:*
Mozilla Corporation
mozilla
>>firefox>>Versions before 153.0.0(exclusive)
cpe:2.3:a:mozilla:firefox:*:*:*:*:-:*:*:*
Mozilla Corporation
mozilla
>>firefox>>Versions from 128.1.0(inclusive) to 140.13.0(exclusive)
cpe:2.3:a:mozilla:firefox:*:*:*:*:esr:*:*:*
Mozilla Corporation
mozilla
>>thunderbird>>Versions before 140.13.0(exclusive)
cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:*
Mozilla Corporation
mozilla
>>thunderbird>>Versions from 141.0(inclusive) to 153.0(exclusive)
cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:*
Weaknesses
CWE IDTypeSource
CWE-346Secondary134c704f-9b21-4f2e-91b3-4a467353bcc0
CWE ID: CWE-346
Type: Secondary
Source: 134c704f-9b21-4f2e-91b3-4a467353bcc0
Evaluator Description

Evaluator Impact

Evaluator Solution

Vendor Statements

References
HyperlinkSourceResource
https://bugzilla.mozilla.org/show_bug.cgi?id=2034682security@mozilla.org
Permissions Required
https://www.mozilla.org/security/advisories/mfsa2026-68/security@mozilla.org
Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2026-69/security@mozilla.org
Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2026-70/security@mozilla.org
Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2026-71/security@mozilla.org
Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2026-72/security@mozilla.org
Vendor Advisory
Hyperlink: https://bugzilla.mozilla.org/show_bug.cgi?id=2034682
Source: security@mozilla.org
Resource:
Permissions Required
Hyperlink: https://www.mozilla.org/security/advisories/mfsa2026-68/
Source: security@mozilla.org
Resource:
Vendor Advisory
Hyperlink: https://www.mozilla.org/security/advisories/mfsa2026-69/
Source: security@mozilla.org
Resource:
Vendor Advisory
Hyperlink: https://www.mozilla.org/security/advisories/mfsa2026-70/
Source: security@mozilla.org
Resource:
Vendor Advisory
Hyperlink: https://www.mozilla.org/security/advisories/mfsa2026-71/
Source: security@mozilla.org
Resource:
Vendor Advisory
Hyperlink: https://www.mozilla.org/security/advisories/mfsa2026-72/
Source: security@mozilla.org
Resource:
Vendor Advisory

Change History

0
Information is not available yet

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Known KEV||Action Due Date - 2024-11-05||Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.

An attacker was able to achieve code execution in the content process by exploiting a use-after-free in Animation timelines. We have had reports of this vulnerability being exploited in the wild. This vulnerability affects Firefox < 131.0.2, Firefox ESR < 128.3.1, Firefox ESR < 115.16.1, Thunderbird < 131.0.1, Thunderbird < 128.3.1, and Thunderbird < 115.16.0.

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Matching Score-8
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ShareView Details
Matching Score-8
Assigner-Mozilla Corporation
CVSS Score-9.8||CRITICAL
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||
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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
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Matching Score-8
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EPSS-0.73% / 50.57%
||
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Updated-03 Nov, 2025 | 23:17
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 present in Firefox 130, Firefox ESR 115.15, Firefox ESR 128.2, and Thunderbird 128.2. 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 affects Firefox < 131, Firefox ESR < 128.3, Firefox ESR < 115.16, Thunderbird < 128.3, and Thunderbird < 131.

Action-Not Available
Vendor-Mozilla Corporation
Product-firefoxthunderbirdFirefoxFirefox ESRThunderbirdfirefoxfirefox_esrthunderbird
CWE ID-CWE-119
Improper Restriction of Operations within the Bounds of a Memory Buffer
CVE-2024-8381
Matching Score-8
Assigner-Mozilla Corporation
ShareView Details
Matching Score-8
Assigner-Mozilla Corporation
CVSS Score-9.8||CRITICAL
EPSS-4.40% / 90.29%
||
7 Day CHG~0.00%
Published-03 Sep, 2024 | 12:32
Updated-04 Nov, 2025 | 17:16
Rejected-Not Available
Known To Be Used In Ransomware Campaigns?-Not Available
KEV Added-Not Available
KEV Action Due Date-Not Available

A potentially exploitable type confusion could be triggered when looking up a property name on an object being used as the `with` environment. This vulnerability affects Firefox < 130, Firefox ESR < 128.2, Firefox ESR < 115.15, Thunderbird < 128.2, and Thunderbird < 115.15.

Action-Not Available
Vendor-Mozilla Corporation
Product-firefoxfirefox_esrFirefoxFirefox ESRThunderbirdfirefoxfirefox_esr
CWE ID-CWE-843
Access of Resource Using Incompatible Type ('Type Confusion')
CVE-2024-7528
Matching Score-8
Assigner-Mozilla Corporation
ShareView Details
Matching Score-8
Assigner-Mozilla Corporation
CVSS Score-9.8||CRITICAL
EPSS-0.52% / 40.84%
||
7 Day CHG~0.00%
Published-06 Aug, 2024 | 12:38
Updated-12 Aug, 2024 | 16:10
Rejected-Not Available
Known To Be Used In Ransomware Campaigns?-Not Available
KEV Added-Not Available
KEV Action Due Date-Not Available

Incorrect garbage collection interaction in IndexedDB could have led to a use-after-free. This vulnerability affects Firefox < 129, Firefox ESR < 128.1, and Thunderbird < 128.1.

Action-Not Available
Vendor-Mozilla Corporation
Product-firefoxthunderbirdfirefox_esrFirefoxFirefox ESRThunderbirdfirefoxthunderbirdfirefox_esr
CWE ID-CWE-416
Use After Free
CVE-2026-16351
Matching Score-8
Assigner-Mozilla Corporation
ShareView Details
Matching Score-8
Assigner-Mozilla Corporation
CVSS Score-9.8||CRITICAL
EPSS-0.42% / 34.36%
||
7 Day CHG~0.00%
Published-21 Jul, 2026 | 12:37
Updated-24 Jul, 2026 | 15:45
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 use-after-free in the DOM: Navigation component

Sandbox escape due to use-after-free in the DOM: Navigation component. This vulnerability was fixed in Firefox 153, Firefox ESR 115.38, Firefox ESR 140.13, Thunderbird 153, and Thunderbird 140.13.

Action-Not Available
Vendor-Mozilla Corporation
Product-thunderbirdfirefoxThunderbirdFirefox
CWE ID-CWE-416
Use After Free
CVE-2024-8385
Matching Score-8
Assigner-Mozilla Corporation
ShareView Details
Matching Score-8
Assigner-Mozilla Corporation
CVSS Score-9.8||CRITICAL
EPSS-0.57% / 43.96%
||
7 Day CHG~0.00%
Published-03 Sep, 2024 | 12:32
Updated-06 Sep, 2024 | 18:31
Rejected-Not Available
Known To Be Used In Ransomware Campaigns?-Not Available
KEV Added-Not Available
KEV Action Due Date-Not Available

A difference in the handling of StructFields and ArrayTypes in WASM could be used to trigger an exploitable type confusion vulnerability. This vulnerability affects Firefox < 130, Firefox ESR < 128.2, and Thunderbird < 128.2.

Action-Not Available
Vendor-Mozilla Corporation
Product-firefoxfirefox_esrFirefoxFirefox ESRThunderbirdfirefoxfirefox_esr
CWE ID-CWE-843
Access of Resource Using Incompatible Type ('Type Confusion')
CVE-2024-8384
Matching Score-8
Assigner-Mozilla Corporation
ShareView Details
Matching Score-8
Assigner-Mozilla Corporation
CVSS Score-9.8||CRITICAL
EPSS-0.72% / 50.05%
||
7 Day CHG~0.00%
Published-03 Sep, 2024 | 12:32
Updated-04 Nov, 2025 | 17:16
Rejected-Not Available
Known To Be Used In Ransomware Campaigns?-Not Available
KEV Added-Not Available
KEV Action Due Date-Not Available

The JavaScript garbage collector could mis-color cross-compartment objects if OOM conditions were detected at the right point between two passes. This could have led to memory corruption. This vulnerability affects Firefox < 130, Firefox ESR < 128.2, Firefox ESR < 115.15, Thunderbird < 128.2, and Thunderbird < 115.15.

Action-Not Available
Vendor-Mozilla Corporation
Product-firefoxfirefox_esrFirefoxFirefox ESRThunderbirdfirefoxfirefox_esr
CWE ID-CWE-416
Use After Free
CWE ID-CWE-787
Out-of-bounds Write
CVE-2024-8387
Matching Score-8
Assigner-Mozilla Corporation
ShareView Details
Matching Score-8
Assigner-Mozilla Corporation
CVSS Score-9.8||CRITICAL
EPSS-0.58% / 44.38%
||
7 Day CHG~0.00%
Published-03 Sep, 2024 | 12:32
Updated-06 Sep, 2024 | 18:31
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 129, Firefox ESR 128.1, and Thunderbird 128.1. 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 < 130, Firefox ESR < 128.2, and Thunderbird < 128.2.

Action-Not Available
Vendor-Mozilla Corporation
Product-firefoxthunderbirdfirefox_esrFirefoxFirefox ESRThunderbirdfirefoxfirefox_esr
CWE ID-CWE-119
Improper Restriction of Operations within the Bounds of a Memory Buffer
CWE ID-CWE-787
Out-of-bounds Write
CVE-2024-8389
Matching Score-8
Assigner-Mozilla Corporation
ShareView Details
Matching Score-8
Assigner-Mozilla Corporation
CVSS Score-9.8||CRITICAL
EPSS-0.49% / 39.23%
||
7 Day CHG~0.00%
Published-03 Sep, 2024 | 12:32
Updated-06 Sep, 2024 | 18:31
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 129. 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 < 130.

Action-Not Available
Vendor-Mozilla Corporation
Product-firefoxFirefoxfirefox
CWE ID-CWE-119
Improper Restriction of Operations within the Bounds of a Memory Buffer
CWE ID-CWE-787
Out-of-bounds Write
CVE-2024-7530
Matching Score-8
Assigner-Mozilla Corporation
ShareView Details
Matching Score-8
Assigner-Mozilla Corporation
CVSS Score-9.8||CRITICAL
EPSS-0.38% / 30.67%
||
7 Day CHG~0.00%
Published-06 Aug, 2024 | 12:38
Updated-12 Aug, 2024 | 16:09
Rejected-Not Available
Known To Be Used In Ransomware Campaigns?-Not Available
KEV Added-Not Available
KEV Action Due Date-Not Available

Incorrect garbage collection interaction could have led to a use-after-free. This vulnerability affects Firefox < 129.

Action-Not Available
Vendor-Mozilla Corporation
Product-firefoxFirefoxfirefox
CWE ID-CWE-416
Use After Free
CVE-2024-6602
Matching Score-8
Assigner-Mozilla Corporation
ShareView Details
Matching Score-8
Assigner-Mozilla Corporation
CVSS Score-9.8||CRITICAL
EPSS-0.98% / 58.46%
||
7 Day CHG~0.00%
Published-09 Jul, 2024 | 14:25
Updated-03 Nov, 2025 | 23:17
Rejected-Not Available
Known To Be Used In Ransomware Campaigns?-Not Available
KEV Added-Not Available
KEV Action Due Date-Not Available
Memory corruption in NSS

A mismatch between allocator and deallocator could have led to memory corruption. This vulnerability affects Firefox < 128, Firefox ESR < 115.13, Thunderbird < 115.13, and Thunderbird < 128.

Action-Not Available
Vendor-Mozilla Corporation
Product-firefoxthunderbirdFirefoxFirefox ESRThunderbirdfirefoxfirefox_esr
CWE ID-CWE-94
Improper Control of Generation of Code ('Code Injection')
CVE-2025-9187
Matching Score-8
Assigner-Mozilla Corporation
ShareView Details
Matching Score-8
Assigner-Mozilla Corporation
CVSS Score-9.8||CRITICAL
EPSS-0.45% / 37.00%
||
7 Day CHG+0.03%
Published-19 Aug, 2025 | 20:33
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 142 and Thunderbird 142

Memory safety bugs present in Firefox 141 and Thunderbird 141. 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 142 and Thunderbird 142.

Action-Not Available
Vendor-Mozilla Corporation
Product-firefoxthunderbirdThunderbirdFirefox
CWE ID-CWE-119
Improper Restriction of Operations within the Bounds of a Memory Buffer
CVE-2024-5695
Matching Score-8
Assigner-Mozilla Corporation
ShareView Details
Matching Score-8
Assigner-Mozilla Corporation
CVSS Score-9.8||CRITICAL
EPSS-0.58% / 44.05%
||
7 Day CHG~0.00%
Published-11 Jun, 2024 | 12:40
Updated-30 Oct, 2024 | 19:35
Rejected-Not Available
Known To Be Used In Ransomware Campaigns?-Not Available
KEV Added-Not Available
KEV Action Due Date-Not Available

If an out-of-memory condition occurs at a specific point using allocations in the probabilistic heap checker, an assertion could have been triggered, and in rarer situations, memory corruption could have occurred. This vulnerability affects Firefox < 127.

Action-Not Available
Vendor-Mozilla Corporation
Product-firefoxFirefox
CWE ID-CWE-787
Out-of-bounds Write
CVE-2025-8038
Matching Score-8
Assigner-Mozilla Corporation
ShareView Details
Matching Score-8
Assigner-Mozilla Corporation
CVSS Score-9.8||CRITICAL
EPSS-0.22% / 13.31%
||
7 Day CHG~0.00%
Published-22 Jul, 2025 | 20:49
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
CSP frame-src was not correctly enforced for paths

Thunderbird ignored paths when checking the validity of navigations in a frame. This vulnerability was fixed in Firefox 141, Firefox ESR 140.1, Thunderbird 141, and Thunderbird 140.1.

Action-Not Available
Vendor-Mozilla Corporation
Product-firefoxthunderbirdThunderbirdFirefox
CWE ID-CWE-345
Insufficient Verification of Data Authenticity
CVE-2024-5701
Matching Score-8
Assigner-Mozilla Corporation
ShareView Details
Matching Score-8
Assigner-Mozilla Corporation
CVSS Score-9.8||CRITICAL
EPSS-0.58% / 44.05%
||
7 Day CHG~0.00%
Published-11 Jun, 2024 | 12:40
Updated-03 Apr, 2025 | 00:44
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 126. 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 < 127.

Action-Not Available
Vendor-Mozilla Corporation
Product-firefoxFirefoxfirefox
CWE ID-CWE-787
Out-of-bounds Write
CVE-2024-5699
Matching Score-8
Assigner-Mozilla Corporation
ShareView Details
Matching Score-8
Assigner-Mozilla Corporation
CVSS Score-9.8||CRITICAL
EPSS-0.77% / 51.94%
||
7 Day CHG~0.00%
Published-11 Jun, 2024 | 12:40
Updated-04 Apr, 2025 | 16:30
Rejected-Not Available
Known To Be Used In Ransomware Campaigns?-Not Available
KEV Added-Not Available
KEV Action Due Date-Not Available

In violation of spec, cookie prefixes such as `__Secure` were being ignored if they were not correctly capitalized - by spec they should be checked with a case-insensitive comparison. This could have resulted in the browser not correctly honoring the behaviors specified by the prefix. This vulnerability affects Firefox < 127.

Action-Not Available
Vendor-Mozilla Corporation
Product-firefoxFirefoxfirefox
CWE ID-CWE-178
Improper Handling of Case Sensitivity
CVE-2025-14330
Matching Score-8
Assigner-Mozilla Corporation
ShareView Details
Matching Score-8
Assigner-Mozilla Corporation
CVSS Score-9.8||CRITICAL
EPSS-0.44% / 35.86%
||
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-2025-13024
Matching Score-8
Assigner-Mozilla Corporation
ShareView Details
Matching Score-8
Assigner-Mozilla Corporation
CVSS Score-9.8||CRITICAL
EPSS-0.35% / 27.21%
||
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
JIT miscompilation in the JavaScript Engine: JIT component

JIT miscompilation in the JavaScript Engine: JIT component. This vulnerability was fixed in Firefox 145 and Thunderbird 145.

Action-Not Available
Vendor-Mozilla Corporation
Product-firefoxThunderbirdFirefox
CWE ID-CWE-733
Compiler Optimization Removal or Modification of Security-critical Code
CVE-2026-4710
Matching Score-8
Assigner-Mozilla Corporation
ShareView Details
Matching Score-8
Assigner-Mozilla Corporation
CVSS Score-9.8||CRITICAL
EPSS-0.41% / 33.45%
||
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-2026-4696
Matching Score-8
Assigner-Mozilla Corporation
ShareView Details
Matching Score-8
Assigner-Mozilla Corporation
CVSS Score-9.8||CRITICAL
EPSS-0.48% / 38.86%
||
7 Day CHG~0.00%
Published-24 Mar, 2026 | 12:30
Updated-15 Jul, 2026 | 02:22
Rejected-Not Available
Known To Be Used In Ransomware Campaigns?-Not Available
KEV Added-Not Available
KEV Action Due Date-Not Available
Use-after-free in the Layout: Text and Fonts component

Use-after-free in the Layout: Text and Fonts component. This vulnerability was fixed in Firefox 149, Firefox ESR 115.34, Firefox ESR 140.9, Thunderbird 149, and Thunderbird 140.9.

Action-Not Available
Vendor-Red Hat, Inc.Mozilla Corporation
Product-firefoxThunderbirdFirefoxRed 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 8.2 Advanced 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-416
Use After Free
CWE ID-CWE-825
Expired Pointer Dereference
CVE-2025-11719
Matching Score-8
Assigner-Mozilla Corporation
ShareView Details
Matching Score-8
Assigner-Mozilla Corporation
CVSS Score-9.8||CRITICAL
EPSS-0.33% / 25.41%
||
7 Day CHG~0.00%
Published-14 Oct, 2025 | 12:27
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
Use-after-free caused by the native messaging web extension API on Windows

Starting in Thunderbird 143, the use of the native messaging API by web extensions on Windows could lead to crashes caused by use-after-free memory corruption. This vulnerability was fixed in Firefox 144 and Thunderbird 144.

Action-Not Available
Vendor-Microsoft CorporationMozilla Corporation
Product-firefoxthunderbirdwindowsThunderbirdFirefox
CWE ID-CWE-416
Use After Free
CVE-2016-9063
Matching Score-8
Assigner-Mozilla Corporation
ShareView Details
Matching Score-8
Assigner-Mozilla Corporation
CVSS Score-9.8||CRITICAL
EPSS-5.74% / 92.25%
||
7 Day CHG~0.00%
Published-11 Jun, 2018 | 21:00
Updated-06 Aug, 2024 | 02:42
Rejected-Not Available
Known To Be Used In Ransomware Campaigns?-Not Available
KEV Added-Not Available
KEV Action Due Date-Not Available

An integer overflow during the parsing of XML using the Expat library. This vulnerability affects Firefox < 50.

Action-Not Available
Vendor-Python Software FoundationDebian GNU/LinuxMozilla Corporation
Product-firefoxdebian_linuxpythonFirefox
CWE ID-CWE-190
Integer Overflow or Wraparound
CVE-2025-1016
Matching Score-8
Assigner-Mozilla Corporation
ShareView Details
Matching Score-8
Assigner-Mozilla Corporation
CVSS Score-9.8||CRITICAL
EPSS-0.57% / 43.75%
||
7 Day CHG~0.00%
Published-04 Feb, 2025 | 13:58
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 135, Thunderbird 135, Firefox ESR 115.20, Firefox ESR 128.7, Thunderbird 115.20, and Thunderbird 128.7

Memory safety bugs present in Firefox 134, Thunderbird 134, Firefox ESR 115.19, Firefox ESR 128.6, Thunderbird 115.19, and Thunderbird 128.6. 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 135, Firefox ESR 115.20, Firefox ESR 128.7, Thunderbird 128.7, and Thunderbird 135.

Action-Not Available
Vendor-Mozilla Corporation
Product-firefoxthunderbirdThunderbirdFirefox
CWE ID-CWE-787
Out-of-bounds Write
CVE-2025-1010
Matching Score-8
Assigner-Mozilla Corporation
ShareView Details
Matching Score-8
Assigner-Mozilla Corporation
CVSS Score-9.8||CRITICAL
EPSS-0.45% / 36.77%
||
7 Day CHG~0.00%
Published-04 Feb, 2025 | 13:58
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
Use-after-free in Custom Highlight

An attacker could have caused a use-after-free via the Custom Highlight API, leading to a potentially exploitable crash. This vulnerability was fixed in Firefox 135, Firefox ESR 115.20, Firefox ESR 128.7, Thunderbird 128.7, and Thunderbird 135.

Action-Not Available
Vendor-Mozilla Corporation
Product-firefoxthunderbirdThunderbirdFirefox
CWE ID-CWE-416
Use After Free
CVE-2025-0247
Matching Score-8
Assigner-Mozilla Corporation
ShareView Details
Matching Score-8
Assigner-Mozilla Corporation
CVSS Score-9.8||CRITICAL
EPSS-9.35% / 94.86%
||
7 Day CHG~0.00%
Published-07 Jan, 2025 | 16:07
Updated-20 May, 2026 | 14:27
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 134 and Thunderbird 134

Memory safety bugs present in Firefox 133 and Thunderbird 133. 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 134 and Thunderbird 134.

Action-Not Available
Vendor-Mozilla Corporation
Product-firefoxthunderbirdFirefoxThunderbird
CWE ID-CWE-787
Out-of-bounds Write
CVE-2024-9402
Matching Score-8
Assigner-Mozilla Corporation
ShareView Details
Matching Score-8
Assigner-Mozilla Corporation
CVSS Score-9.8||CRITICAL
EPSS-0.61% / 45.55%
||
7 Day CHG~0.00%
Published-01 Oct, 2024 | 15:13
Updated-04 Apr, 2025 | 14:38
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 130, Firefox ESR 128.2, and Thunderbird 128.2. 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 affects Firefox < 131, Firefox ESR < 128.3, Thunderbird < 128.3, and Thunderbird < 131.

Action-Not Available
Vendor-Mozilla Corporation
Product-thunderbirdfirefoxFirefoxFirefox ESRThunderbirdfirefoxthunderbirdfirefox_esr
CWE ID-CWE-119
Improper Restriction of Operations within the Bounds of a Memory Buffer
CVE-2024-7521
Matching Score-8
Assigner-Mozilla Corporation
ShareView Details
Matching Score-8
Assigner-Mozilla Corporation
CVSS Score-9.8||CRITICAL
EPSS-0.62% / 45.84%
||
7 Day CHG~0.00%
Published-06 Aug, 2024 | 12:38
Updated-12 Aug, 2024 | 16:05
Rejected-Not Available
Known To Be Used In Ransomware Campaigns?-Not Available
KEV Added-Not Available
KEV Action Due Date-Not Available

Incomplete WebAssembly exception handing could have led to a use-after-free. This vulnerability affects Firefox < 129, Firefox ESR < 115.14, Firefox ESR < 128.1, Thunderbird < 128.1, and Thunderbird < 115.14.

Action-Not Available
Vendor-Mozilla Corporation
Product-firefoxthunderbirdfirefox_esrFirefoxFirefox ESRThunderbirdfirefoxthunderbirdfirefox_esr
CWE ID-CWE-755
Improper Handling of Exceptional Conditions
CVE-2024-6611
Matching Score-8
Assigner-Mozilla Corporation
ShareView Details
Matching Score-8
Assigner-Mozilla Corporation
CVSS Score-9.8||CRITICAL
EPSS-0.66% / 47.87%
||
7 Day CHG~0.00%
Published-09 Jul, 2024 | 14:25
Updated-30 Oct, 2025 | 16:15
Rejected-Not Available
Known To Be Used In Ransomware Campaigns?-Not Available
KEV Added-Not Available
KEV Action Due Date-Not Available
Incorrect handling of SameSite cookies

A nested iframe, triggering a cross-site navigation, could send SameSite=Strict or Lax cookies. This vulnerability affects Firefox < 128 and Thunderbird < 128.

Action-Not Available
Vendor-Mozilla Corporation
Product-thunderbirdfirefoxFirefoxThunderbirdfirefox
CWE ID-CWE-1275
Sensitive Cookie with Improper SameSite Attribute
CVE-2024-4778
Matching Score-8
Assigner-Mozilla Corporation
ShareView Details
Matching Score-8
Assigner-Mozilla Corporation
CVSS Score-9.8||CRITICAL
EPSS-0.44% / 36.03%
||
7 Day CHG~0.00%
Published-14 May, 2024 | 17:21
Updated-04 Apr, 2025 | 14:26
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 125. 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 < 126.

Action-Not Available
Vendor-Mozilla Corporation
Product-firefoxFirefoxfirefox
CWE ID-CWE-1260
Improper Handling of Overlap Between Protected Memory Ranges
CVE-2024-4764
Matching Score-8
Assigner-Mozilla Corporation
ShareView Details
Matching Score-8
Assigner-Mozilla Corporation
CVSS Score-9.8||CRITICAL
EPSS-0.57% / 43.75%
||
7 Day CHG~0.00%
Published-14 May, 2024 | 17:21
Updated-01 Apr, 2025 | 17:42
Rejected-Not Available
Known To Be Used In Ransomware Campaigns?-Not Available
KEV Added-Not Available
KEV Action Due Date-Not Available

Multiple WebRTC threads could have claimed a newly connected audio input leading to use-after-free. This vulnerability affects Firefox < 126.

Action-Not Available
Vendor-Mozilla Corporation
Product-firefoxFirefoxfirefox
CWE ID-CWE-416
Use After Free
CVE-2019-9791
Matching Score-8
Assigner-Mozilla Corporation
ShareView Details
Matching Score-8
Assigner-Mozilla Corporation
CVSS Score-9.8||CRITICAL
EPSS-19.76% / 97.12%
||
7 Day CHG~0.00%
Published-26 Apr, 2019 | 16:13
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

The type inference system allows the compilation of functions that can cause type confusions between arbitrary objects when compiled through the IonMonkey just-in-time (JIT) compiler and when the constructor function is entered through on-stack replacement (OSR). This allows for possible arbitrary reading and writing of objects during an exploitable crash. This vulnerability affects Thunderbird < 60.6, Firefox ESR < 60.6, and Firefox < 66.

Action-Not Available
Vendor-Red Hat, Inc.Mozilla Corporation
Product-enterprise_linux_eusthunderbirdenterprise_linux_server_tusfirefoxenterprise_linuxenterprise_linux_server_ausThunderbirdFirefox ESRFirefox
CWE ID-CWE-843
Access of Resource Using Incompatible Type ('Type Confusion')
CVE-2019-9792
Matching Score-8
Assigner-Mozilla Corporation
ShareView Details
Matching Score-8
Assigner-Mozilla Corporation
CVSS Score-9.8||CRITICAL
EPSS-13.20% / 95.96%
||
7 Day CHG~0.00%
Published-26 Apr, 2019 | 16:13
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

The IonMonkey just-in-time (JIT) compiler can leak an internal JS_OPTIMIZED_OUT magic value to the running script during a bailout. This magic value can then be used by JavaScript to achieve memory corruption, which results in a potentially exploitable crash. This vulnerability affects Thunderbird < 60.6, Firefox ESR < 60.6, and Firefox < 66.

Action-Not Available
Vendor-Red Hat, Inc.Mozilla Corporation
Product-enterprise_linux_eusthunderbirdenterprise_linux_server_tusfirefoxenterprise_linuxenterprise_linux_server_ausThunderbirdFirefox ESRFirefox
CWE ID-CWE-787
Out-of-bounds Write
CVE-2019-9805
Matching Score-8
Assigner-Mozilla Corporation
ShareView Details
Matching Score-8
Assigner-Mozilla Corporation
CVSS Score-9.8||CRITICAL
EPSS-1.21% / 65.26%
||
7 Day CHG~0.00%
Published-26 Apr, 2019 | 16:13
Updated-04 Aug, 2024 | 22:01
Rejected-Not Available
Known To Be Used In Ransomware Campaigns?-Not Available
KEV Added-Not Available
KEV Action Due Date-Not Available

A latent vulnerability exists in the Prio library where data may be read from uninitialized memory for some functions, leading to potential memory corruption. This vulnerability affects Firefox < 66.

Action-Not Available
Vendor-Mozilla Corporation
Product-firefoxFirefox
CWE ID-CWE-908
Use of Uninitialized Resource
CVE-2010-3765
Matching Score-8
Assigner-MITRE Corporation
ShareView Details
Matching Score-8
Assigner-MITRE Corporation
CVSS Score-9.8||CRITICAL
EPSS-83.28% / 99.65%
||
7 Day CHG~0.00%
Published-27 Oct, 2010 | 22:00
Updated-22 Apr, 2026 | 14:15
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 - 2025-10-27||Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

Mozilla Firefox 3.5.x through 3.5.14 and 3.6.x through 3.6.11, Thunderbird 3.1.6 before 3.1.6 and 3.0.x before 3.0.10, and SeaMonkey 2.x before 2.0.10, when JavaScript is enabled, allows remote attackers to execute arbitrary code via vectors related to nsCSSFrameConstructor::ContentAppended, the appendChild method, incorrect index tracking, and the creation of multiple frames, which triggers memory corruption, as exploited in the wild in October 2010 by the Belmoo malware.

Action-Not Available
Vendor-n/aMozilla Corporation
Product-thunderbirdfirefoxseamonkeyn/aMultiple Products
CWE ID-CWE-119
Improper Restriction of Operations within the Bounds of a Memory Buffer
CVE-2010-1205
Matching Score-8
Assigner-MITRE Corporation
ShareView Details
Matching Score-8
Assigner-MITRE Corporation
CVSS Score-9.8||CRITICAL
EPSS-43.38% / 98.59%
||
7 Day CHG~0.00%
Published-30 Jun, 2010 | 18:00
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

Buffer overflow in pngpread.c in libpng before 1.2.44 and 1.4.x before 1.4.3, as used in progressive applications, might allow remote attackers to execute arbitrary code via a PNG image that triggers an additional data row.

Action-Not Available
Vendor-libpngn/aCanonical Ltd.Apple Inc.openSUSEGoogle LLCSUSEMozilla CorporationDebian GNU/LinuxVMware (Broadcom Inc.)Fedora Project
Product-thunderbirddebian_linuxubuntu_linuxseamonkeymac_os_xlinux_enterprise_serverfedorachromemac_os_x_serverworkstationitunesfirefoxplayerlibpngiphone_ossafariopensusen/a
CWE ID-CWE-120
Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')
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