Home / mailings [SECURITY] [DSA 6461-1] thunderbird security update
Posted on 23 August 2026
Debian Security Advisory- -------------------------------------------------------------------------
Debian Security Advisory DSA-6461-1 security@debian.org
https://www.debian.org/security/ Moritz Muehlenhoff
August 23, 2026 https://www.debian.org/security/faq
- -------------------------------------------------------------------------
Package : thunderbird
CVE ID : CVE-2026-74934 CVE-2026-74935 CVE-2026-74936 CVE-2026-74939
CVE-2026-74940 CVE-2026-74941 CVE-2026-74942 CVE-2026-74943
CVE-2026-74944 CVE-2026-74945 CVE-2026-74946 CVE-2026-74948
CVE-2026-74949 CVE-2026-74953 CVE-2026-74957 CVE-2026-74959
CVE-2026-74960 CVE-2026-74962 CVE-2026-74963 CVE-2026-74964
CVE-2026-74965 CVE-2026-74967 CVE-2026-74969 CVE-2026-74971
CVE-2026-74972 CVE-2026-74973 CVE-2026-74974 CVE-2026-74976
CVE-2026-74983 CVE-2026-74987 CVE-2026-74990
Multiple security issues were discovered in Thunderbird, which could
result in the execution of arbitrary code or information disclosure
For the stable distribution (trixie), these problems have been fixed in
version 1:140.14.0esr-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/
Mailing list: debian-security-announce@lists.debian.org
