FIREFOX · CVE-2026-124859 · Other
NO FIX YET · SEE WHAT TO DO
A boundary-check error in the Storage Cache API of Firefox allows a sandbox escape. An attacker who gets content running in the browser may be able to break out of the sandbox that normally contains it.
first public Nov 10, 2026 · 1 source
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Anyone running a Firefox release or ESR build older than the fixed versions. The sources do not say whether specific configurations are exposed, so unknown beyond the version check.
Not affected if fixed-version
Who cares browser, firefox, linux, macos, windows
firefox --version on the machine160, 115.45 (ESR) and 153.7 (ESR)160115.45153.7Sandbox escape due to incorrect boundary conditions in the Storage: Cache API component. This vulnerability was fixed in Firefox 160, Firefox ESR 115.45, and Firefox ESR 153.7.
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