CVE-2026-109712: Vulnerability in Mozilla Firefox
Description
Sandbox escape due to uninitialized memory in the Graphics component. This vulnerability was fixed in Firefox 158, Firefox ESR 115.43, 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
This vulnerability involves uninitialized memory in the Graphics component of Mozilla Firefox, which can lead to sandbox escape. The flaw was addressed and fixed in Firefox version 158 and in the Extended Support Release (ESR) versions 115.43 and 153.5. No CVSS score is provided, and there are no known exploits in the wild at the time of publication.
Potential Impact
Successful exploitation could allow an attacker to escape the sandbox environment of Firefox, potentially leading to execution of arbitrary code outside the browser's restricted environment. This elevates the risk of further system compromise. However, no active exploitation has been reported.
Mitigation Recommendations
Users should update to Firefox 158, Firefox ESR 115.43, or Firefox ESR 153.5 or later to remediate this vulnerability. Applying these official fixes fully mitigates the risk.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- mozilla
- Date Reserved
- 2026-10-13T00:29:20.766Z
- State
- PUBLISHED
- Vendor Advisory Urls
- [{"url":"https://www.mozilla.org/security/advisories/mfsa2026-106/","vendor":"Mozilla"},{"url":"https://www.mozilla.org/security/advisories/mfsa2026-107/","vendor":"Mozilla"},{"url":"https://www.mozilla.org/security/advisories/mfsa2026-108/","vendor":"Mozilla"}]
Threat ID: 6ace2c432cdf04f65661d4ce
Added to database: 10/13/2026, 13:04:03 UTC
Last enriched: 10/13/2026, 14:19:22 UTC
Last updated: 10/13/2026, 18:57:33 UTC
Views: 2
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