CVE-2026-92043: Vulnerability in Mozilla Firefox
Privilege escalation due to incorrect boundary conditions in the Audio/Video component. This vulnerability was fixed in Firefox 156, Firefox ESR 153.3, and Thunderbird 156.
AI Analysis
Technical Summary
This vulnerability involves incorrect boundary conditions in the Audio/Video component of Mozilla Firefox, leading to privilege escalation. The flaw was addressed and fixed in Firefox 156 and Firefox ESR 153.3. The Mozilla advisory lists this as a high-impact issue and includes it among multiple security fixes in Firefox 156.
Potential Impact
Successful exploitation of this vulnerability could allow an attacker to escalate privileges within the Firefox browser, potentially enabling unauthorized actions or access beyond normal user permissions. However, there are no known exploits in the wild at the time of this advisory.
Mitigation Recommendations
Users should update to Firefox 156 or later, or Firefox ESR 153.3 or later, to remediate this vulnerability. The vendor has released an official fix, and applying this update fully mitigates the issue.
CVE-2026-92043: Vulnerability in Mozilla Firefox
Description
Privilege escalation due to incorrect boundary conditions in the Audio/Video component. This vulnerability was fixed in Firefox 156, Firefox ESR 153.3, and Thunderbird 156.
CVSS v3.1
Score 8.8high
Affected software
Mozilla
Firefox
Mozilla
Thunderbird
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Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability involves incorrect boundary conditions in the Audio/Video component of Mozilla Firefox, leading to privilege escalation. The flaw was addressed and fixed in Firefox 156 and Firefox ESR 153.3. The Mozilla advisory lists this as a high-impact issue and includes it among multiple security fixes in Firefox 156.
Potential Impact
Successful exploitation of this vulnerability could allow an attacker to escalate privileges within the Firefox browser, potentially enabling unauthorized actions or access beyond normal user permissions. However, there are no known exploits in the wild at the time of this advisory.
Mitigation Recommendations
Users should update to Firefox 156 or later, or Firefox ESR 153.3 or later, to remediate this vulnerability. The vendor has released an official fix, and applying this update fully mitigates the issue.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- mozilla
- Date Reserved
- 2026-09-15T12:34:03.813Z
- State
- PUBLISHED
- Vendor Advisory Urls
- [{"url":"https://www.mozilla.org/security/advisories/mfsa2026-90/","vendor":"Mozilla"},{"url":"https://www.mozilla.org/security/advisories/mfsa2026-93/","vendor":"Mozilla"}]
Threat ID: 6aa93e6355bf5e2cf5d30ffb
Added to database: 09/15/2026, 12:47:31 UTC
Last enriched: 09/15/2026, 13:17:22 UTC
Last updated: 09/16/2026, 03:19:12 UTC
Views: 10
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