CVE-2026-124879 · Runtime
NO FIX YET · SEE WHAT TO DO
An invalid pointer in Firefox's Networking Cache component was fixed in Firefox 160 and Firefox ESR 153.7. The sources do not state what an attacker can achieve beyond that memory-safety flaw.
first public Nov 10, 2026 · 1 source
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Anyone running Firefox or Firefox ESR older than the fixed versions is exposed to this networking cache flaw. Systems on managed Firefox builds should follow their own update channel. The sources do not say whether the flaw is reachable from web content without user action.
Not affected if already-updated
Who cares browser, firefox, firefox-esr
firefox --version.160 for Firefox and 153.7 for Firefox ESR.160153.7Invalid pointer in the Networking: Cache component. This vulnerability was fixed in Firefox 160 and Firefox ESR 153.7.
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