Alerts This Week
Warning Icon 1 690
Alerts This Week
Warning Icon 1 690

Debian DSA-6148-1 firefox-esr Critical Code Execution Risks

debian
Calendar Grey February 25, 2026
Debian Logo
Multiple security issues in Firefox could lead to privilege escalation and arbitrary code execution in Debian.
Multiple security issues have been found in the Mozilla Firefox web browser, which could potentially result in the execution of arbitrary code, sandbox escape, bypass of the same-o...
Topics%20covered

Topics Covered

security advisory critical debian arbitrary code execution information disclosure firefox-esr

Summary

For the oldstable distribution (bookworm), these problems have been fixed
in version 140.8.0esr-1~deb12u1.

For the stable distribution (trixie), these problems have been fixed in
version 140.8.0esr-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/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-2026-2757 CVE-2026-2758 CVE-2026-2759 CVE-2026-2760

Topics%20covered

Topics Covered

security advisory critical debian arbitrary code execution information disclosure firefox-esr

Get the latest News and Insights

Get the latest Linux and open source security news straight to your inbox.

Your message here