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Alerts This Week
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Debian ThunderBird Important Arbitrary Code Execution Vuln DSA-6288-1

debian
Calendar Grey May 21, 2026
Debian Logo
Address multiple security issues in Thunderbird that could result in arbitrary code execution for Debian distributions. Upgrade recommended.
Multiple security issues were discovered in Thunderbird, which could result in the execution of arbitrary code
Topics%20covered

Topics Covered

security advisory update debian arbitrary code execution important thunderbird

Summary

For the oldstable distribution (bookworm), these problems have been fixed
in version 1:140.11.0esr-1~deb12u1.

For the stable distribution (trixie), these problems have been fixed in
version 1:140.11.0esr-1~deb13u1.

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 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: thunderbird
CVE ID: CVE-2026-8388 CVE-2026-8391 CVE-2026-8401 CVE-2026-8946

Topics%20covered

Topics Covered

security advisory update debian arbitrary code execution important thunderbird

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