CVE-2026-124853 · Other
NO FIX YET · SEE WHAT TO DO
A flaw in Firefox's Graphics: Text component lets content break out of the browser's sandbox. The sources do not say what an attacker gets beyond that escape.
first public Nov 10, 2026 · 1 source
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Anyone running Firefox or Firefox ESR older than the fixed versions is exposed, since the flaw is in the browser itself. Sources do not say whether a specific page or content type is needed to trigger it.
Not affected if already-updated
Who cares browser, desktop, firefox
firefox --version160, 115.45 (ESR) and 153.7 (ESR)160115.45 and 153.7Sandbox escape due to incorrect boundary conditions in the Graphics: Text component. This vulnerability was fixed in Firefox 160, Firefox ESR 115.45, and Firefox ESR 153.7.
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