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Debian Firefox ESR Important Code Execution Risks DSA-6394-1

debian
Calendar Grey July 22, 2026
Scroller Debian
Multiple security threats found in Mozilla Firefox lead to various risks including code execution and privilege escalation. Mitigate them now.
Debian has released a security advisory for firefox-esr addressing multiple vulnerabilities that could allow arbitrary code execution and other risks, urging users to upgrade their...
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Topics Covered

security advisory debian important mozilla information disclosure execution

Summary

For the stable distribution (trixie), these problems have been fixed in
version 140.13.0esr-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-2026-15718 CVE-2026-15719 CVE-2026-16349 CVE-2026-16350

Topics%20covered

Topics Covered

security advisory debian important mozilla information disclosure execution

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