CVE-2026-109727: Vulnerability in Mozilla Firefox
Description
Use-after-free in the Audio/Video 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
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Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability involves a use-after-free condition within the Audio/Video component of Mozilla Firefox. Use-after-free vulnerabilities can lead to memory corruption, potentially allowing an attacker to execute arbitrary code or cause a denial of service. Mozilla has released fixes for this issue in Firefox 158, Firefox ESR 115.43, and Firefox ESR 153.5.
Potential Impact
The vulnerability could allow an attacker to exploit memory corruption in the Audio/Video component, which may lead to arbitrary code execution or application crashes. However, no known exploits in the wild have been reported at this time.
Mitigation Recommendations
Users and administrators should update Firefox to version 158, Firefox ESR 115.43, or Firefox ESR 153.5 or later to remediate this vulnerability. Applying these official fixes fully mitigates the issue.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- mozilla
- Date Reserved
- 2026-10-13T00:29:33.789Z
- 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: 6ace2c462cdf04f65661d523
Added to database: 10/13/2026, 13:04:06 UTC
Last enriched: 10/13/2026, 14:05:21 UTC
Last updated: 10/13/2026, 18:57:33 UTC
Views: 2
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