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Alerts This Week
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Debian 11 Thunderbird Security Fix DLA-4594-1 Multiple Code Execution

debian lts
Calendar Grey May 22, 2026
Dist Debian Esm H88
Upgrade Thunderbird in Debian 11 bullseye to fix multiple security issues and avoid code execution risks.
Multiple security issues were discovered in Thunderbird, which could result in the execution of arbitrary code
Topics%20covered

Topics Covered

security advisory debian arbitrary code update recommended thunderbird execution issue

Summary

For Debian 11 bullseye, these problems have been fixed in version
1:140.11.0esr-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: 1:140.11.0esr-1~deb11u1
CVE ID: CVE-2026-8388 CVE-2026-8391 CVE-2026-8401 CVE-2026-8946

Topics%20covered

Topics Covered

security advisory debian arbitrary code update recommended thunderbird execution issue

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