CVE-2026-92005: Vulnerability in Mozilla Firefox
Use-after-free in the Audio/Video: Web Codecs component. This vulnerability was fixed in Firefox 156, Firefox ESR 140.16, Firefox ESR 153.3, Thunderbird 156, and Thunderbird 140.16.
AI Analysis
Technical Summary
CVE-2026-92005 is a use-after-free vulnerability affecting the Audio/Video: Web Codecs component in Mozilla Firefox. This memory safety flaw could potentially allow an attacker to cause unexpected behavior or execute arbitrary code. Mozilla has addressed this vulnerability by releasing fixes in Firefox 156, Firefox ESR 140.16, and Firefox ESR 153.3. The vendor advisory classifies the impact as high and provides detailed bug references. No active exploitation has been reported.
Potential Impact
The vulnerability could allow an attacker to exploit a use-after-free condition in the Web Codecs component, potentially leading to memory corruption and arbitrary code execution. Mozilla rates the impact as high. However, there are no known exploits in the wild at this time.
Mitigation Recommendations
Mozilla has released official fixes for this vulnerability in Firefox 156, Firefox ESR 140.16, and Firefox ESR 153.3. Users and administrators should update to these versions or later to mitigate the risk. Since the vulnerability is patched, no additional mitigation steps are required.
CVE-2026-92005: Vulnerability in Mozilla Firefox
Description
Use-after-free in the Audio/Video: Web Codecs component. This vulnerability was fixed in Firefox 156, Firefox ESR 140.16, Firefox ESR 153.3, Thunderbird 156, and Thunderbird 140.16.
Affected software
Mozilla
Firefox
Mozilla
Thunderbird
pkg:github/mozilla/firefoxRun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-92005 is a use-after-free vulnerability affecting the Audio/Video: Web Codecs component in Mozilla Firefox. This memory safety flaw could potentially allow an attacker to cause unexpected behavior or execute arbitrary code. Mozilla has addressed this vulnerability by releasing fixes in Firefox 156, Firefox ESR 140.16, and Firefox ESR 153.3. The vendor advisory classifies the impact as high and provides detailed bug references. No active exploitation has been reported.
Potential Impact
The vulnerability could allow an attacker to exploit a use-after-free condition in the Web Codecs component, potentially leading to memory corruption and arbitrary code execution. Mozilla rates the impact as high. However, there are no known exploits in the wild at this time.
Mitigation Recommendations
Mozilla has released official fixes for this vulnerability in Firefox 156, Firefox ESR 140.16, and Firefox ESR 153.3. Users and administrators should update to these versions or later to mitigate the risk. Since the vulnerability is patched, no additional mitigation steps are required.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- mozilla
- Date Reserved
- 2026-09-15T12:33:23.954Z
- State
- PUBLISHED
- Vendor Advisory Urls
- [{"url":"https://www.mozilla.org/security/advisories/mfsa2026-90/","vendor":"Mozilla"},{"url":"https://www.mozilla.org/security/advisories/mfsa2026-92/","vendor":"Mozilla"},{"url":"https://www.mozilla.org/security/advisories/mfsa2026-93/","vendor":"Mozilla"}]
Threat ID: 6aa93e5e55bf5e2cf5d30fc5
Added to database: 09/15/2026, 12:47:26 UTC
Last enriched: 09/15/2026, 13:46:44 UTC
Last updated: 09/15/2026, 22:11:29 UTC
Views: 4
Community Reviews
0 reviewsCrowdsource mitigation strategies, share intel context, and vote on the most helpful responses. Sign in to add your voice and help keep defenders ahead.
Want to contribute mitigation steps or threat intel context? Sign in or create an account to join the community discussion.
Actions
Updates to AI analysis require Pro Console access. Upgrade inside Console → Billing.
Need more coverage?
Upgrade to Pro Console for AI refresh and higher limits.
For incident response and remediation, OffSeq services can help resolve threats faster.
Latest Threats
Check if your credentials are on the dark web
Instant breach scanning across billions of leaked records. Free tier available.