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Debian LTS Advisory DLA-4442-1 [email protected]
https://www.debian.org/lts/security/ Emilio Pozuelo Monfort
January 19, 2026 https://wiki.debian.org/LTS
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Package : thunderbird
Version : 1:140.7.0esr-1~deb11u1
CVE ID : CVE-2025-14327 CVE-2026-0877 CVE-2026-0878 CVE-2026-0879
CVE-2026-0880 CVE-2026-0882 CVE-2026-0883 CVE-2026-0884
CVE-2026-0885 CVE-2026-0886 CVE-2026-0887 CVE-2026-0890
CVE-2026-0891
Multiple security issues were discovered in Thunderbird, which could
result in the execution of arbitrary code.
For Debian 11 bullseye, these problems have been fixed in version
1:140.7.0esr-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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