CVE-2026-109752: Vulnerability in Mozilla Firefox
Description
Use-after-free in the DOM: Workers component. This vulnerability was fixed in Firefox 158, Firefox ESR 153.5, Thunderbird 158, and Thunderbird 153.5.
CVSS v3.1
Score 5.4medium
Affected software
Mozilla
Firefox
Mozilla
Thunderbird
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability involves a use-after-free condition within the DOM Workers component of Mozilla Firefox. Such a flaw can potentially lead to memory corruption issues. Mozilla has fixed this vulnerability in Firefox 158 and Firefox ESR 153.5, as documented in their security advisories MFSA2026-106 and MFSA2026-108.
Potential Impact
The vulnerability could allow for memory corruption due to use-after-free in the DOM Workers component. However, there are no known active exploits in the wild. The impact is mitigated by the availability of fixed versions.
Mitigation Recommendations
Users and administrators should upgrade to Firefox 158 or later, or Firefox ESR 153.5 or later, where this vulnerability has been fixed. No additional mitigation steps are indicated by the vendor advisories.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- mozilla
- Date Reserved
- 2026-10-13T00:29:57.019Z
- 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: 6ace2c4d2cdf04f65661d554
Added to database: 10/13/2026, 13:04:13 UTC
Last enriched: 10/13/2026, 13:34:52 UTC
Last updated: 10/13/2026, 18:57:33 UTC
Views: 3
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