CVE-2026-109723: Vulnerability in Mozilla Firefox
Description
Integer overflow in the Layout: Text and Fonts 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-2026-109723 describes an integer overflow vulnerability in the Layout: Text and Fonts component of Mozilla Firefox. The flaw could potentially affect the processing of text and fonts within the browser. Mozilla released fixes for this vulnerability in Firefox 158 and Firefox ESR 153.5.
Potential Impact
The vulnerability could lead to unexpected behavior or memory corruption in the affected component. However, no specific exploitation details or impacts are provided in the available data. There are no known exploits in the wild at this time.
Mitigation Recommendations
Users should update to Firefox 158 or later, or Firefox ESR 153.5 or later, to ensure the vulnerability is remediated. Since official fixes are available, applying these updates is the recommended mitigation.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- mozilla
- Date Reserved
- 2026-10-13T00:29:30.452Z
- 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: 6ace2c462cdf04f65661d51f
Added to database: 10/13/2026, 13:04:06 UTC
Last enriched: 10/13/2026, 14:05:37 UTC
Last updated: 10/13/2026, 18:57:33 UTC
Views: 2
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