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Debian Firefox-ESR Critical Code Execution Advisory DSA-6202-1

debian
Calendar Grey April 8, 2026
Debian Logo
Mozilla Firefox for Debian has critical issues fixed. Upgrade to new releases to mitigate risks effectively.
Multiple security issues have been found in the Mozilla Firefox web browser, which could potentially result in the execution of arbitrary code
Topics%20covered

Topics Covered

security advisory critical debian arbitrary code execution firefox-esr

Summary

For the oldstable distribution (bookworm), these problems have been fixed
in version 140.9.1esr-1~deb12u1.

For the stable distribution (trixie), these problems have been fixed in
version 140.9.1esr-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/source-package/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/



Severity
critical
Lowest
Low
Medium
High
Critical

Package: firefox-esr
CVE ID: CVE-2026-5731 CVE-2026-5732 CVE-2026-5734

Topics%20covered

Topics Covered

security advisory critical debian arbitrary code execution firefox-esr

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