Alerts This Week
Warning Icon 1 588
Alerts This Week
Warning Icon 1 588

Debian Firefox-ESR Important Security Issues DSA-6350-1

debian
Calendar Grey June 17, 2026
Debian Logo
Debian Security Advisory on Firefox-ESR reports multiple security issues that could allow code execution or privilege escalation.
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, pr...
Topics%20covered

Topics Covered

security advisory debian privilege escalation arbitrary code execution important firefox-esr

Summary

For the stable distribution (trixie), these problems have been fixed in
version 140.12.0esr-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/



Severity
important
Lowest
Low
Medium
High
Critical

Package: firefox-esr
CVE ID: CVE-2026-12289 CVE-2026-12290 CVE-2026-12291 CVE-2026-12292

Topics%20covered

Topics Covered

security advisory debian privilege escalation arbitrary code execution important firefox-esr

Get the latest News and Insights

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

Your message here