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Alerts This Week
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Debian 11 DLA-4549-1 Thunderbird Critical Arbitrary Code Threat

debian lts
Calendar Grey April 26, 2026
Scroller Debian Lts
Multiple critical security issues in Thunderbird require immediate updates for Debian 11 to prevent arbitrary code execution.
Multiple security issues were discovered in Thunderbird, which could result in the execution of arbitrary code
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Topics Covered

security advisory critical debian arbitrary code execution thunderbird

Summary

For Debian 11 bullseye, these problems have been fixed in version
1:140.10.0esr-1~deb11u1.

We recommend that you upgrade your thunderbird packages.

For the detailed security status of thunderbird please refer to
its security tracker page at:
https://security-tracker.debian.org/tracker/thunderbird

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
critical
Lowest
Low
Medium
High
Critical

Package: thunderbird
Version: 1:140.10.0esr-1~deb11u1
CVE ID: CVE-2026-6746 CVE-2026-6747 CVE-2026-6748 CVE-2026-6749

Topics%20covered

Topics Covered

security advisory critical debian arbitrary code execution thunderbird

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