Debian 11 Thunderbird Critical Code Execution Info Disclosure DLA-4495-1
debian lts
February 28, 2026
Multiple security issues were discovered in Thunderbird, which could result in the execution of arbitrary code or information disclosure
Summary
For Debian 11 bullseye, these problems have been fixed in version
1:140.8.0esr-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
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Critical
Package: thunderbird
Version: 1:140.8.0esr-1~deb11u1
CVE ID: CVE-2026-2757 CVE-2026-2758 CVE-2026-2759 CVE-2026-2761
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