CVE-2026-100831
HighCVSS 8.8Summary
Use-after-free in the DOM: UI Events & Focus Handling component. This vulnerability was fixed in Firefox ESR 153.4 and Firefox 157.
Risk Assessment
An attacker could exploit the vulnerability to execute arbitrary code or cause a browser crash, potentially leading to system compromise.
Recommendation
Update Firefox to version ESR 153.4 or 157 (or later) to fix the use-after-free vulnerability.
Other vulnerabilities in Firefox
See all- CVE-2026-96869Medium
Information disclosure in the Networking component. This vulnerability was fixed in Firefox ESR 153.4, Firefox 157, and Firefox ESR 140.17.
- CVE-2026-100832High
Use-after-free in the Graphics: Canvas2D component. This vulnerability was fixed in Firefox ESR 153.4, Firefox ESR 115.42, and Firefox ESR 140.17.
- CVE-2026-100830Unknown
Mitigation bypass in the DOM: Navigation component. This vulnerability was fixed in Firefox ESR 153.4 and Firefox 157.
- CVE-2026-100829Unknown
Mitigation bypass in the DOM: Security component. This vulnerability was fixed in Firefox ESR 153.4 and Firefox 157.
- CVE-2026-100828Unknown
Mitigation bypass in the Bookmarks & History component. This vulnerability was fixed in Firefox ESR 153.4 and Firefox 157.
- CVE-2026-100826Medium
Denial-of-service in the Storage: StorageManager component. This vulnerability was fixed in Firefox ESR 153.4 and Firefox 157.
- CVE-2026-100825High
Use-after-free in the JavaScript Engine: JIT component. This vulnerability was fixed in Firefox ESR 153.4 and Firefox 157.
- CVE-2026-100824High
Privilege escalation in the Places component. This vulnerability was fixed in Firefox ESR 153.4 and Firefox 157.
- CVE-2026-100822Unknown
Spoofing issue in the Networking: HTTP component. This vulnerability was fixed in Firefox ESR 153.4 and Firefox 157.
- CVE-2026-100821Unknown
Site isolation issue in the Panning and Zooming component. This vulnerability was fixed in Firefox ESR 153.4, Firefox 157, Firefox ESR 115.42, and Firefox ESR 140.17.
Original NVD description (English source)
Use-after-free in the DOM: UI Events & Focus Handling component. This vulnerability was fixed in Firefox ESR 153.4 and Firefox 157.
Vulnerability data from NVD (NIST) · CISA KEV · EPSS