CVE-2026-109724: Vulnerability in Mozilla Firefox
Description
Use-after-free in the DOM: Core & HTML 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
This vulnerability involves a use-after-free condition within the DOM: Core & HTML component of Mozilla Firefox. Use-after-free vulnerabilities can lead to memory corruption and potentially allow an attacker to execute arbitrary code or cause a denial of service. Mozilla fixed this issue 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 exploit memory corruption in the affected component, potentially leading to arbitrary code execution or application crashes. However, no active exploitation has been reported.
Mitigation Recommendations
Users and administrators should update Firefox to version 158 or later, or Firefox ESR to version 153.5 or later, where this vulnerability has been fixed. No additional mitigation is required once the update is applied.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- mozilla
- Date Reserved
- 2026-10-13T00:29:31.304Z
- 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: 6ace2c462cdf04f65661d520
Added to database: 10/13/2026, 13:04:06 UTC
Last enriched: 10/13/2026, 14:05:33 UTC
Last updated: 10/13/2026, 18:57:33 UTC
Views: 2
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