CVE-2026-109706: Vulnerability in Mozilla Firefox
Description
Use-after-free in the Storage: IndexedDB component. This vulnerability was fixed in Firefox 158, Firefox ESR 115.43, Firefox ESR 153.5, Thunderbird 158, and Thunderbird 153.5.
CVSS v3.1
Score 5.4medium
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.
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-109706 is a use-after-free vulnerability affecting the Storage: IndexedDB component in Mozilla Firefox. This flaw could potentially lead to memory corruption issues. Mozilla has released fixes for this vulnerability in Firefox 158, Firefox ESR 115.43, and Firefox ESR 153.5.
Potential Impact
The vulnerability could allow an attacker to exploit memory management errors in the IndexedDB component, potentially leading to application crashes or arbitrary code execution. However, no known exploits in the wild have been reported at this time.
Mitigation Recommendations
Mozilla has provided official fixes for this vulnerability in Firefox 158, Firefox ESR 115.43, and Firefox ESR 153.5. Users and administrators should update to these versions or later to remediate the issue.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- mozilla
- Date Reserved
- 2026-10-13T00:29:15.656Z
- 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: 6ace2c402cdf04f65661caf3
Added to database: 10/13/2026, 13:04:00 UTC
Last enriched: 10/13/2026, 14:19:44 UTC
Last updated: 10/13/2026, 18:57:33 UTC
Views: 2
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