External Control of Assumed-Immutable Web Parameter Affecting thunderbird package, versions <0:140.11.1-1.amzn2.0.2


Severity

Recommended
high

Based on Amazon Linux security rating.

Threat Intelligence

EPSS
0.32% (24th percentile)

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  • Snyk IDSNYK-AMZN2-THUNDERBIRD-17286790
  • published10 Jun 2026
  • disclosed19 May 2026

Introduced: 19 May 2026

CVE-2026-8961  (opens in a new tab)
CWE-472  (opens in a new tab)

How to fix?

Upgrade Amazon-Linux:2 thunderbird to version 0:140.11.1-1.amzn2.0.2 or higher.
This issue was patched in ALAS2-2026-3340.

NVD Description

Note: Versions mentioned in the description apply only to the upstream thunderbird package and not the thunderbird package as distributed by Amazon-Linux. See How to fix? for Amazon-Linux:2 relevant fixed versions and status.

Spoofing issue in the Form Autofill component. This vulnerability was fixed in Firefox 151, Firefox ESR 140.11, Thunderbird 151, and Thunderbird 140.11.

CVSS Base Scores

version 3.1