This page tracks the Debian fix status. The vulnerability itself is described on the main CVE page.
View CVE-2026-74976 →
DEBIAN-CVE-2026-74976
JIT miscompilation in the JavaScript Engine: JIT component. This vulnerability was fixed in Firefox 154, Firefox ESR 140.14, Firefox ESR 153.1, Thunde...
Original description
The description as published by the source.
JIT miscompilation in the JavaScript Engine: JIT component. This vulnerability was fixed in Firefox 154, Firefox ESR 140.14, Firefox ESR 153.1, Thunderbird 154, Thunderbird 140.14, and Thunderbird 153.1.
Source: OSV.dev (Open Source Vulnerabilities) OSV
Affected packages
Debian:12
firefox-esr
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"140.14.0esr-1~deb12u1"}]}]
Debian:13
firefox-esr
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"140.14.0esr-1~deb13u1"}]}]
Debian:14
firefox-esr
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"140.14.0esr-2"}]}]
Debian:12
thunderbird
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1:140.14.0esr-1~deb12u1"}]}]
Debian:13
thunderbird
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1:140.14.0esr-1~deb13u1"}]}]
Debian:14
thunderbird
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1:140.14.0esr-1"}]}]
References
- advisory security-tracker.debian.org