This page tracks the Debian fix status. The vulnerability itself is described on the main CVE page.
View CVE-2026-109766 →
DEBIAN-CVE-2026-109766
Mitigation bypass in the Enterprise Policies component. This vulnerability was fixed in Firefox 158, Firefox ESR 153.5, Thunderbird 158, and Thunderbi...
Original description
The description as published by the source.
Mitigation bypass in the Enterprise Policies component. This vulnerability was fixed in Firefox 158, Firefox ESR 153.5, Thunderbird 158, and Thunderbird 153.5.
Source: OSV.dev (Open Source Vulnerabilities) OSV
Affected packages
Debian:12
firefox-esr
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"153.5.0esr-1~deb12u1"}]}]
Debian:13
firefox-esr
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"153.5.0esr-1~deb13u1"}]}]
Debian:14
firefox-esr
[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]
Debian:12
thunderbird
[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]
Debian:13
thunderbird
[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]
Debian:14
thunderbird
[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]
References
- advisory security-tracker.debian.org