CVE-2026-109760: Vulnerability in Mozilla Firefox
Description
Mitigation bypass in the Networking: HTTP component. This vulnerability was fixed in Firefox 158, Firefox ESR 153.5, Thunderbird 158, and Thunderbird 153.5.
Affected software
Mozilla
Firefox
Mozilla
Thunderbird
pkg:github/mozilla/firefox-esrRun 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-2026-109760 is a mitigation bypass vulnerability affecting the Networking: HTTP component in Mozilla Firefox. The flaw allows bypassing certain security mitigations, potentially weakening the browser's defenses. Mozilla released fixes in Firefox 158 and Firefox ESR 153.5 to resolve this issue.
Potential Impact
The vulnerability could allow attackers to bypass security mitigations related to HTTP networking in Firefox, potentially increasing the risk of exploitation. However, no known exploits in the wild have been reported, indicating limited or no active exploitation at this time.
Mitigation Recommendations
Users should update to Firefox 158 or later, or Firefox ESR 153.5 or later, where this vulnerability has been fixed. Applying these official updates fully mitigates the issue.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- mozilla
- Date Reserved
- 2026-10-13T00:48:25.231Z
- State
- PUBLISHED
- Vendor Advisory Urls
- [{"url":"https://www.mozilla.org/security/advisories/mfsa2026-106/","vendor":"Mozilla"},{"url":"https://www.mozilla.org/security/advisories/mfsa2026-108/","vendor":"Mozilla"}]
Threat ID: 6ace2c4d2cdf04f65661d55b
Added to database: 10/13/2026, 13:04:13 UTC
Last enriched: 10/13/2026, 13:34:27 UTC
Last updated: 10/13/2026, 18:57:33 UTC
Views: 9
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