Home / mailings [SECURITY] [DSA 6481-1] firefox-esr security update
Posted on 02 September 2026
Debian Security Advisory- -------------------------------------------------------------------------
Debian Security Advisory DSA-6481-1 security@debian.org
https://www.debian.org/security/ Moritz Muehlenhoff
September 02, 2026 https://www.debian.org/security/faq
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Package : firefox-esr
CVE ID : CVE-2026-16365 CVE-2026-16371 CVE-2026-75874 CVE-2026-84119
CVE-2026-84120 CVE-2026-84121 CVE-2026-84122 CVE-2026-84124
CVE-2026-84131 CVE-2026-84143 CVE-2026-84145
Multiple security issues have been found in the Mozilla Firefox web
browser, which could potentially result in the execution of arbitrary
code, sandbox escape or privilege escalation.
For the stable distribution (trixie), these problems have been fixed in
version 140.15.0esr-1~deb13u1.
We recommend that you upgrade your firefox-esr packages.
For the detailed security status of firefox-esr please refer to
its security tracker page at:
https://security-tracker.debian.org/tracker/firefox-esr
Further information about Debian Security Advisories, how to apply
these updates to your system and frequently asked questions can be
found at: https://www.debian.org/security/
Mailing list: debian-security-announce@lists.debian.org
