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Alerts This Week
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Debian LTS Important Security Patch Released for Firefox ESR DLA-4695-1

debian lts
Calendar Grey July 22, 2026
Scroller Debian Lts
Security update for Firefox in Debian LTS addresses multiple critical issues including execution of arbitrary code. Upgrade advised.
Debian has patched multiple security vulnerabilities in the firefox-esr package to prevent code execution, privilege escalation, and information disclosure, recommending upgrades f...
Topics%20covered

Topics Covered

security advisory important arbitrary code execution firefox-esr deblts

Summary

For Debian 11 bullseye, these problems have been fixed in version
140.13.0esr-1~deb11u1.

For Debian 12 bookworm, these problems have been fixed in version
140.13.0esr-1~deb12u1.

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


Severity
important
Lowest
Low
Medium
High
Critical

Package: firefox-esr
Version: 140.13.0esr-1~deb11u1 140.13.0esr-1~deb12u1
CVE ID: CVE-2026-15718 CVE-2026-15719 CVE-2026-16349 CVE-2026-16350

Topics%20covered

Topics Covered

security advisory important arbitrary code execution firefox-esr deblts

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