[SECURITY] [DLA 4510-1] firefox-esr security update
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Debian LTS Advisory DLA-4510-1 debian-lts@lists.debian.org
https://www.debian.org/lts/security/ Emilio Pozuelo Monfort
March 26, 2026 https://wiki.debian.org/LTS
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Package : firefox-esr
Version : 140.9.0esr-1~deb11u1
CVE ID : CVE-2025-59375 CVE-2026-4684 CVE-2026-4685 CVE-2026-4686
CVE-2026-4687 CVE-2026-4688 CVE-2026-4689 CVE-2026-4690
CVE-2026-4691 CVE-2026-4692 CVE-2026-4693 CVE-2026-4694
CVE-2026-4695 CVE-2026-4696 CVE-2026-4697 CVE-2026-4698
CVE-2026-4699 CVE-2026-4700 CVE-2026-4701 CVE-2026-4702
CVE-2026-4704 CVE-2026-4705 CVE-2026-4706 CVE-2026-4707
CVE-2026-4708 CVE-2026-4709 CVE-2026-4710 CVE-2026-4713
CVE-2026-4714 CVE-2026-4715 CVE-2026-4716 CVE-2026-4717
CVE-2026-4718 CVE-2026-4719 CVE-2026-4720 CVE-2026-4721
Multiple security issues have been found in the Mozilla Firefox web
browser, which could potentially result in the execution of arbitrary
code, sandbox escape, information disclosure, denial of service or
privilege escalation.
For Debian 11 bullseye, these problems have been fixed in version
140.9.0esr-1~deb11u1.
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 LTS security advisories, how to apply
these updates to your system and frequently asked questions can be
found at: https://wiki.debian.org/LTS
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