CVE-2026-109735: Vulnerability in Mozilla Firefox
Description
Use-after-free in the DOM: Animation component. This vulnerability was fixed in Firefox 158 and Thunderbird 158.
CVSS v3.1
Score 5.4medium
Affected software
Mozilla
Firefox
Mozilla
Thunderbird
Run 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-2026-109735 is a use-after-free vulnerability affecting the DOM Animation component in Mozilla Firefox. The flaw could potentially allow for memory corruption issues. Mozilla fixed this vulnerability in Firefox version 158.
Potential Impact
The vulnerability could lead to memory corruption due to use-after-free in the animation component of the DOM. No known exploits in the wild have been reported. The impact is limited to affected versions prior to Firefox 158.
Mitigation Recommendations
Users should update to Firefox version 158 or later, where this vulnerability has been fixed. No additional mitigation steps are indicated by the vendor advisory.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- mozilla
- Date Reserved
- 2026-10-13T00:29:41.019Z
- State
- PUBLISHED
- Vendor Advisory Urls
- [{"url":"https://www.mozilla.org/security/advisories/mfsa2026-106/","vendor":"Mozilla"}]
Threat ID: 6ace2c482cdf04f65661d53b
Added to database: 10/13/2026, 13:04:08 UTC
Last enriched: 10/13/2026, 13:49:11 UTC
Last updated: 10/13/2026, 18:57:33 UTC
Views: 2
Community Reviews
0 reviewsCrowdsource mitigation strategies, share intel context, and vote on the most helpful responses. Sign in to add your voice and help keep defenders ahead.
Want to contribute mitigation steps or threat intel context? Sign in or create an account to join the community discussion.
Actions
Updates to AI analysis require Pro Console access. Upgrade inside Console → Billing.
Need more coverage?
Upgrade to Pro Console for AI refresh and higher limits.
For incident response and remediation, OffSeq services can help resolve threats faster.
Latest Threats
Check if your credentials are on the dark web
Instant breach scanning across billions of leaked records. Free tier available.