CVE-2026-16359: Vulnerability in Mozilla Firefox
CVE-2026-16359 is a critical vulnerability in Mozilla Firefox related to incorrect boundary conditions in the Audio/Video GMP component. This flaw could lead to high impact consequences including potential arbitrary code execution due to memory corruption. The vulnerability affects Firefox versions prior to 153 and Firefox ESR versions prior to 115.38 and 140.13. Mozilla has fixed this issue in Firefox 153, Firefox ESR 115.38, and Firefox ESR 140.13. No known exploits in the wild have been reported at this time.
AI Analysis
Technical Summary
CVE-2026-16359 is a critical memory safety vulnerability caused by incorrect boundary conditions in the Audio/Video GMP component of Mozilla Firefox. This vulnerability was addressed and fixed in Firefox 153, Firefox ESR 115.38, and Firefox ESR 140.13. The flaw is classified under CWE-119 (Improper Restriction of Operations within the Bounds of a Memory Buffer) and has a CVSS v3.1 base score of 9.1, indicating critical severity with network attack vector, low attack complexity, no privileges required, no user interaction, and high confidentiality and integrity impact. The Mozilla security advisories confirm the fix and note the potential for exploitation due to memory corruption, although no active exploitation has been observed.
Potential Impact
The vulnerability allows an attacker to exploit incorrect boundary conditions in the Audio/Video GMP component, potentially leading to memory corruption and arbitrary code execution. The CVSS score of 9.1 reflects a critical impact with high confidentiality and integrity consequences. This could allow remote attackers to compromise affected Firefox installations without user interaction or privileges.
Mitigation Recommendations
Mozilla has released official fixes for this vulnerability in Firefox 153, Firefox ESR 115.38, and Firefox ESR 140.13. Users and administrators should update to these versions or later to remediate the issue. There are no indications that additional mitigations are required beyond applying the official patches. Patch status is confirmed by Mozilla advisories.
CVE-2026-16359: Vulnerability in Mozilla Firefox
Description
CVE-2026-16359 is a critical vulnerability in Mozilla Firefox related to incorrect boundary conditions in the Audio/Video GMP component. This flaw could lead to high impact consequences including potential arbitrary code execution due to memory corruption. The vulnerability affects Firefox versions prior to 153 and Firefox ESR versions prior to 115.38 and 140.13. Mozilla has fixed this issue in Firefox 153, Firefox ESR 115.38, and Firefox ESR 140.13. No known exploits in the wild have been reported at this time.
CVSS v3.1
Score 9.1critical
Affected software
pkg:github/mozilla/firefox-esrRun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-16359 is a critical memory safety vulnerability caused by incorrect boundary conditions in the Audio/Video GMP component of Mozilla Firefox. This vulnerability was addressed and fixed in Firefox 153, Firefox ESR 115.38, and Firefox ESR 140.13. The flaw is classified under CWE-119 (Improper Restriction of Operations within the Bounds of a Memory Buffer) and has a CVSS v3.1 base score of 9.1, indicating critical severity with network attack vector, low attack complexity, no privileges required, no user interaction, and high confidentiality and integrity impact. The Mozilla security advisories confirm the fix and note the potential for exploitation due to memory corruption, although no active exploitation has been observed.
Potential Impact
The vulnerability allows an attacker to exploit incorrect boundary conditions in the Audio/Video GMP component, potentially leading to memory corruption and arbitrary code execution. The CVSS score of 9.1 reflects a critical impact with high confidentiality and integrity consequences. This could allow remote attackers to compromise affected Firefox installations without user interaction or privileges.
Mitigation Recommendations
Mozilla has released official fixes for this vulnerability in Firefox 153, Firefox ESR 115.38, and Firefox ESR 140.13. Users and administrators should update to these versions or later to remediate the issue. There are no indications that additional mitigations are required beyond applying the official patches. Patch status is confirmed by Mozilla advisories.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- mozilla
- Date Reserved
- 2026-07-20T21:56:07.912Z
- Cvss Version
- null
- State
- PUBLISHED
- Remediation Level
- null
- Vendor Advisory Urls
- [{"url":"https://www.mozilla.org/security/advisories/mfsa2026-68/","vendor":"Mozilla"},{"url":"https://www.mozilla.org/security/advisories/mfsa2026-69/","vendor":"Mozilla"},{"url":"https://www.mozilla.org/security/advisories/mfsa2026-70/","vendor":"Mozilla"}]
Threat ID: 6a5f6cbb2a4a8d59892624f6
Added to database: 07/21/2026, 12:57:31 UTC
Last enriched: 07/30/2026, 10:55:13 UTC
Last updated: 08/27/2026, 22:52:09 UTC
Views: 74
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