CVE-2026-109741: Vulnerability in Mozilla Firefox
Description
Use-after-free in the Storage: Bucket File System 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
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Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-109741 is a use-after-free vulnerability affecting the Storage: Bucket File System component in Mozilla Firefox. The flaw could potentially lead to memory corruption issues. Mozilla 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 an attacker to cause memory corruption through use-after-free conditions in the affected component. However, there are no known active exploits in the wild, and the issue has been resolved in the specified fixed versions.
Mitigation Recommendations
Users and administrators should update Mozilla Firefox to version 158 or later, or Firefox ESR 153.5 or later, to remediate this vulnerability. Applying these official fixes fully addresses the issue.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- mozilla
- Date Reserved
- 2026-10-13T00:29:46.940Z
- 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: 6ace2c482cdf04f65661d541
Added to database: 10/13/2026, 13:04:08 UTC
Last enriched: 10/13/2026, 13:48:52 UTC
Last updated: 10/13/2026, 18:57:33 UTC
Views: 3
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