Home / mailings [SECURITY] [DSA 6394-1] firefox-esr security update
Posted on 22 July 2026
Debian Security Advisory- -------------------------------------------------------------------------
Debian Security Advisory DSA-6394-1 security@debian.org
https://www.debian.org/security/ Salvatore Bonaccorso
July 22, 2026 https://www.debian.org/security/faq
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Package : firefox-esr
CVE ID : CVE-2026-15718 CVE-2026-15719 CVE-2026-16349 CVE-2026-16350
CVE-2026-16351 CVE-2026-16352 CVE-2026-16353 CVE-2026-16354
CVE-2026-16355 CVE-2026-16356 CVE-2026-16357 CVE-2026-16358
CVE-2026-16359 CVE-2026-16360 CVE-2026-16361 CVE-2026-16362
CVE-2026-16363 CVE-2026-16368 CVE-2026-16369 CVE-2026-16371
CVE-2026-16374 CVE-2026-16375 CVE-2026-16377 CVE-2026-16379
CVE-2026-16381 CVE-2026-16383 CVE-2026-16387 CVE-2026-16390
CVE-2026-16391 CVE-2026-16396 CVE-2026-16405 CVE-2026-16412
Multiple security issues have been found in the Mozilla Firefox web
browser, which could potentially result in the execution of arbitrary
code, bypass of the same-origin policy, privilege escalation,
information disclosure, spoofing or sandbox escape.
For the stable distribution (trixie), these problems have been fixed in
version 140.13.0esr-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
