CVE-2026-8946: Vulnerability in Mozilla Firefox
Incorrect boundary conditions in the Audio/Video: Web Codecs component. This vulnerability was fixed in Firefox 151, Firefox ESR 115.36, Firefox ESR 140.11, Thunderbird 151, and Thunderbird 140.11.
AI Analysis
Technical Summary
CVE-2026-8946 involves incorrect boundary conditions in the Audio/Video: Web Codecs component of Mozilla Firefox. This vulnerability was fixed in Firefox 151, Firefox ESR 115.36, and Firefox ESR 140.11. The Mozilla advisories indicate this issue has a high impact and is among several memory safety bugs fixed in these releases. No CVSS score is provided, but the vendor classifies the impact as high. The vulnerability could potentially lead to memory corruption, though no active exploitation has been reported.
Potential Impact
The vulnerability could allow an attacker to cause memory corruption in the Audio/Video: Web Codecs component, which may lead to potential security issues such as arbitrary code execution. Mozilla rates the impact as high. There are no known exploits in the wild currently. The issue affects Firefox versions prior to 151 and ESR versions prior to 115.36 and 140.11.
Mitigation Recommendations
Mozilla has released official fixes for this vulnerability in Firefox 151, Firefox ESR 115.36, and Firefox ESR 140.11. Users and administrators should update to these versions or later to remediate the vulnerability. Since this is not a cloud service, remediation depends on applying these updates. Patch status is confirmed by the vendor advisories.
CVE-2026-8946: Vulnerability in Mozilla Firefox
Description
Incorrect boundary conditions in the Audio/Video: Web Codecs component. This vulnerability was fixed in Firefox 151, Firefox ESR 115.36, Firefox ESR 140.11, Thunderbird 151, and Thunderbird 140.11.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-8946 involves incorrect boundary conditions in the Audio/Video: Web Codecs component of Mozilla Firefox. This vulnerability was fixed in Firefox 151, Firefox ESR 115.36, and Firefox ESR 140.11. The Mozilla advisories indicate this issue has a high impact and is among several memory safety bugs fixed in these releases. No CVSS score is provided, but the vendor classifies the impact as high. The vulnerability could potentially lead to memory corruption, though no active exploitation has been reported.
Potential Impact
The vulnerability could allow an attacker to cause memory corruption in the Audio/Video: Web Codecs component, which may lead to potential security issues such as arbitrary code execution. Mozilla rates the impact as high. There are no known exploits in the wild currently. The issue affects Firefox versions prior to 151 and ESR versions prior to 115.36 and 140.11.
Mitigation Recommendations
Mozilla has released official fixes for this vulnerability in Firefox 151, Firefox ESR 115.36, and Firefox ESR 140.11. Users and administrators should update to these versions or later to remediate the vulnerability. Since this is not a cloud service, remediation depends on applying these updates. Patch status is confirmed by the vendor advisories.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- mozilla
- Date Reserved
- 2026-05-19T12:29:35.532Z
- Cvss Version
- null
- State
- PUBLISHED
- Remediation Level
- null
- Vendor Advisory Urls
- [{"url":"https://www.mozilla.org/security/advisories/mfsa2026-46/","vendor":"Mozilla"},{"url":"https://www.mozilla.org/security/advisories/mfsa2026-47/","vendor":"Mozilla"},{"url":"https://www.mozilla.org/security/advisories/mfsa2026-48/","vendor":"Mozilla"}]
Threat ID: 6a0c6779ec166c07b0a99379
Added to database: 5/19/2026, 1:36:57 PM
Last enriched: 5/19/2026, 2:07:41 PM
Last updated: 5/20/2026, 3:11:09 PM
Views: 14
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