CVE-2026-92016: Vulnerability in Mozilla Firefox
Use-after-free in the Disability Access APIs component. This vulnerability was fixed in Firefox 156, Firefox ESR 140.16, Firefox ESR 153.3, Thunderbird 156, and Thunderbird 140.16.
AI Analysis
Technical Summary
This vulnerability involves a use-after-free condition in the Disability Access APIs component of Mozilla Firefox. Use-after-free vulnerabilities occur when a program continues to use a pointer after the memory it points to has been freed, potentially leading to memory corruption or arbitrary code execution. Mozilla fixed this issue in Firefox 156, Firefox ESR 140.16, and Firefox ESR 153.3. The vendor advisory classifies the impact as high and provides official patches in these versions.
Potential Impact
The vulnerability has a high impact rating as per the Mozilla advisory. Use-after-free bugs can lead to memory corruption, which may be exploited to execute arbitrary code or cause a denial of service. However, there are no reports of active exploitation in the wild at this time.
Mitigation Recommendations
Mozilla has released official fixes for this vulnerability in Firefox 156, Firefox ESR 140.16, and Firefox ESR 153.3. Users and administrators should update to these versions or later to mitigate the risk. Since official patches are available, applying these updates is the recommended remediation.
CVE-2026-92016: Vulnerability in Mozilla Firefox
Description
Use-after-free in the Disability Access APIs component. This vulnerability was fixed in Firefox 156, Firefox ESR 140.16, Firefox ESR 153.3, Thunderbird 156, and Thunderbird 140.16.
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.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability involves a use-after-free condition in the Disability Access APIs component of Mozilla Firefox. Use-after-free vulnerabilities occur when a program continues to use a pointer after the memory it points to has been freed, potentially leading to memory corruption or arbitrary code execution. Mozilla fixed this issue in Firefox 156, Firefox ESR 140.16, and Firefox ESR 153.3. The vendor advisory classifies the impact as high and provides official patches in these versions.
Potential Impact
The vulnerability has a high impact rating as per the Mozilla advisory. Use-after-free bugs can lead to memory corruption, which may be exploited to execute arbitrary code or cause a denial of service. However, there are no reports of active exploitation in the wild at this time.
Mitigation Recommendations
Mozilla has released official fixes for this vulnerability in Firefox 156, Firefox ESR 140.16, and Firefox ESR 153.3. Users and administrators should update to these versions or later to mitigate the risk. Since official patches are available, applying these updates is the recommended remediation.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- mozilla
- Date Reserved
- 2026-09-15T12:33:35.485Z
- State
- PUBLISHED
- Vendor Advisory Urls
- [{"url":"https://www.mozilla.org/security/advisories/mfsa2026-90/","vendor":"Mozilla"},{"url":"https://www.mozilla.org/security/advisories/mfsa2026-92/","vendor":"Mozilla"},{"url":"https://www.mozilla.org/security/advisories/mfsa2026-93/","vendor":"Mozilla"}]
Threat ID: 6aa93e6055bf5e2cf5d30fda
Added to database: 09/15/2026, 12:47:28 UTC
Last enriched: 09/15/2026, 13:32:46 UTC
Last updated: 09/15/2026, 22:11:29 UTC
Views: 3
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.