Out-of-Bounds Affecting thunderbird package, versions <0:140.17.0-1.el9_6


Severity

Recommended
0.0
high
0
10

Based on Red Hat Enterprise Linux security rating.

Threat Intelligence

EPSS
0.26% (17th percentile)

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  • Snyk IDSNYK-RHEL9-THUNDERBIRD-21692827
  • published24 Oct 2026
  • disclosed29 Sept 2026

Introduced: 29 Sep 2026

CVE-2026-100782  (opens in a new tab)
CWE-119  (opens in a new tab)

How to fix?

Upgrade RHEL:9 thunderbird to version 0:140.17.0-1.el9_6 or higher.
This issue was patched in RHSA-2026:85244.

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.

Privilege escalation due to incorrect boundary conditions in the Graphics component. This vulnerability was fixed in Firefox ESR 153.4, Thunderbird 157, Thunderbird 140.17, Thunderbird 153.4, Firefox 157, Firefox ESR 115.42, and Firefox ESR 140.17.

CVSS Base Scores

version 3.1