Origin Validation Error Affecting thunderbird package, versions <0:153.5.0-1.el9_8


Severity

Recommended
high

Based on Red Hat Enterprise Linux security rating.

Threat Intelligence

EPSS
0.34% (26th percentile)

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  • Snyk IDSNYK-RHEL9-THUNDERBIRD-22134488
  • published2 Nov 2026
  • disclosed13 Oct 2026

Introduced: 13 Oct 2026

NewCVE-2026-109734  (opens in a new tab)
CWE-346  (opens in a new tab)

How to fix?

Upgrade RHEL:9 thunderbird to version 0:153.5.0-1.el9_8 or higher.
This issue was patched in RHSA-2026:93443.

NVD Description

Note: Versions mentioned in the description apply only to the upstream thunderbird package and not the thunderbird package as distributed by RHEL. See How to fix? for RHEL:9 relevant fixed versions and status.

Mitigation bypass in the DOM: Security component. This vulnerability was fixed in Firefox 158, Firefox ESR 153.5, Thunderbird 158, and Thunderbird 153.5.

CVSS Base Scores

version 3.1