CVE-2026-92029: Vulnerability in Mozilla Firefox
Use-after-free in the SVG component. This vulnerability was fixed in Firefox 156, Firefox ESR 115.41, Firefox ESR 140.16, Firefox ESR 153.3, Thunderbird 156, and Thunderbird 140.16.
AI Analysis
Technical Summary
This vulnerability involves a use-after-free condition in the SVG component of Mozilla Firefox, which could potentially lead to memory corruption or other security issues. Mozilla has fixed this vulnerability in Firefox 156 and corresponding ESR releases 115.41, 140.16, and 153.3. The vendor advisory classifies the impact as high and lists this fix among multiple security updates released on September 15, 2026.
Potential Impact
The vulnerability is rated as high impact by Mozilla, indicating it could allow an attacker to cause memory corruption or potentially execute arbitrary code via the SVG component. However, there are no reports of active exploitation in the wild. The fix mitigates the risk by correcting the use-after-free condition.
Mitigation Recommendations
A security update fixing this vulnerability is available in Firefox 156 and Firefox ESR 115.41, 140.16, and 153.3. Users and administrators should apply these updates promptly to mitigate the risk. No additional mitigation steps are indicated by the vendor advisory.
CVE-2026-92029: Vulnerability in Mozilla Firefox
Description
Use-after-free in the SVG component. This vulnerability was fixed in Firefox 156, Firefox ESR 115.41, 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
This vulnerability involves a use-after-free condition in the SVG component of Mozilla Firefox, which could potentially lead to memory corruption or other security issues. Mozilla has fixed this vulnerability in Firefox 156 and corresponding ESR releases 115.41, 140.16, and 153.3. The vendor advisory classifies the impact as high and lists this fix among multiple security updates released on September 15, 2026.
Potential Impact
The vulnerability is rated as high impact by Mozilla, indicating it could allow an attacker to cause memory corruption or potentially execute arbitrary code via the SVG component. However, there are no reports of active exploitation in the wild. The fix mitigates the risk by correcting the use-after-free condition.
Mitigation Recommendations
A security update fixing this vulnerability is available in Firefox 156 and Firefox ESR 115.41, 140.16, and 153.3. Users and administrators should apply these updates promptly to mitigate the risk. No additional mitigation steps are indicated by the vendor advisory.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- mozilla
- Date Reserved
- 2026-09-15T12:33:49.345Z
- State
- PUBLISHED
- Vendor Advisory Urls
- [{"url":"https://www.mozilla.org/security/advisories/mfsa2026-90/","vendor":"Mozilla"},{"url":"https://www.mozilla.org/security/advisories/mfsa2026-91/","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: 6aa93e6255bf5e2cf5d30fe8
Added to database: 09/15/2026, 12:47:30 UTC
Last enriched: 09/15/2026, 13:31:47 UTC
Last updated: 09/16/2026, 04:01:24 UTC
Views: 10
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