CVE-2026-124943
UnknownSummary
Use-after-free vulnerability in the Layout component of Firefox. It was fixed in Firefox 160.
Risk Assessment
May lead to browser crashes or potential arbitrary code execution during page rendering. Organizations with vulnerable versions are exposed to attacks via crafted pages.
Recommendation
Update Firefox to version 160 or later. Prioritize workstations that browse untrusted sites.
Other vulnerabilities in Firefox
See all- CVE-2026-124951Unknown
Privilege escalation vulnerability in the Nimbus Desktop Client component of Firefox. It was fixed in Firefox 160 and Firefox ESR 153.7.
- CVE-2026-124950Unknown
Same-origin policy bypass vulnerability in the CSS Parsing and Computation component of Firefox. It was fixed in Firefox 160.
- CVE-2026-124949Unknown
An unspecified vulnerability in the SVG component of Firefox. It was fixed in Firefox 160.
- CVE-2026-124948High
Vulnerability caused by incorrect boundary conditions and use-after-free in the Graphics component of Firefox. It was fixed in Firefox 160 and Firefox ESR 153.7.
- CVE-2026-124947High
Vulnerability caused by incorrect boundary conditions in the Graphics component of Firefox. It was fixed in Firefox 160.
- CVE-2026-124946Unknown
Invalid pointer vulnerability in the JavaScript Engine: JIT component of Firefox. It was fixed in Firefox 160.
- CVE-2026-124945Unknown
Invalid pointer vulnerability in the Layout: Text and Fonts component of Firefox. It was fixed in Firefox 160.
- CVE-2026-124944Medium
Information disclosure vulnerability in the Marionette component of Firefox. It was fixed in Firefox 160.
- CVE-2026-124942Unknown
Invalid pointer in the DOM: Streams component of Firefox. This vulnerability was fixed in Firefox 160 and Firefox ESR 153.7.
- CVE-2026-124941Medium
Information disclosure in the Security: RLBox component of Firefox. This vulnerability was fixed in Firefox 160 and Firefox ESR 153.7.
Original NVD description (English source)
Use-after-free in the Layout component. This vulnerability was fixed in Firefox 160.
Vulnerability data from NVD (NIST) · CISA KEV · EPSS