CVE-2026-100772: Vulnerability in Mozilla Firefox
Use-after-free in the DOM: Core & HTML component. This vulnerability was fixed in Firefox ESR 153.4, Firefox 157, and Firefox ESR 140.17.
AI Analysis
Technical Summary
This vulnerability involves a use-after-free condition in the DOM: Core & HTML 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, which can lead to memory corruption and potentially exploitable conditions. Mozilla fixed this vulnerability in Firefox ESR 153.4, Firefox 157, and Firefox ESR 140.17. The Mozilla advisory lists this as a high impact issue and provides references to the bug tracking number 2068340.
Potential Impact
The vulnerability is classified as high impact by Mozilla, indicating that successful exploitation could lead to significant security consequences such as memory corruption. However, no known exploits in the wild have been reported at this time.
Mitigation Recommendations
An official fix is available and has been released in Firefox ESR 153.4, Firefox 157, and Firefox ESR 140.17. Users and administrators should update to these versions or later to remediate this vulnerability. No additional mitigation actions are indicated by the vendor advisory.
CVE-2026-100772: Vulnerability in Mozilla Firefox
Description
Use-after-free in the DOM: Core & HTML component. This vulnerability was fixed in Firefox ESR 153.4, Firefox 157, and Firefox ESR 140.17.
CVSS v3.1
Score 8.8high
Affected software
Mozilla
Firefox
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability involves a use-after-free condition in the DOM: Core & HTML 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, which can lead to memory corruption and potentially exploitable conditions. Mozilla fixed this vulnerability in Firefox ESR 153.4, Firefox 157, and Firefox ESR 140.17. The Mozilla advisory lists this as a high impact issue and provides references to the bug tracking number 2068340.
Potential Impact
The vulnerability is classified as high impact by Mozilla, indicating that successful exploitation could lead to significant security consequences such as memory corruption. However, no known exploits in the wild have been reported at this time.
Mitigation Recommendations
An official fix is available and has been released in Firefox ESR 153.4, Firefox 157, and Firefox ESR 140.17. Users and administrators should update to these versions or later to remediate this vulnerability. No additional mitigation actions are indicated by the vendor advisory.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- mozilla
- Date Reserved
- 2026-09-26T19:15:28.393Z
- State
- PUBLISHED
- Vendor Advisory Urls
- [{"url":"https://www.mozilla.org/security/advisories/mfsa2026-100/","vendor":"Mozilla"},{"url":"https://www.mozilla.org/security/advisories/mfsa2026-97/","vendor":"Mozilla"},{"url":"https://www.mozilla.org/security/advisories/mfsa2026-99/","vendor":"Mozilla"}]
Threat ID: 6abbb3edf7a7c54106640970
Added to database: 09/29/2026, 12:49:49 UTC
Last enriched: 09/29/2026, 13:33:14 UTC
Last updated: 09/29/2026, 18:20:12 UTC
Views: 3
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