Red Hat Security Advisory

RHSA-2026:90895

thunderbird security, bug fix, and enhancement update

Released 2026-10-27 · Red Hat rating Important · View on Red Hat →

Fixed in

Red Hat Enterprise Linux AppStream (v. 10) thunderbird-153.5.0-1.el10_2

Fixes 1 record

TI-2026-33006 CVE-2026-45186 · GHSA-r396-2q2c-pjhr

In libexpat before 2.8.1, the computational complexity of attribute name collision checks…

LOW 33

In libexpat before 2.8.1, the computational complexity of attribute name collision checks allows a denial of service via moderately sized crafted XML input.

CVSS 3.1HIGH 7.5 Network No auth No interaction EPSS 0.00479 Published 2026-05-10 Partial fix · 2.8.1 CWE-407