Origin Validation Error Affecting firefox-esr package, versions <140.6-r0


Severity

Recommended
0.0
medium
0
10

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Threat Intelligence

EPSS
0.18% (9th percentile)

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  • Snyk IDSNYK-CHAINGUARDLATEST-FIREFOXESR-17764808
  • published1 Jul 2026
  • disclosed9 Dec 2025

Introduced: 9 Dec 2025

CVE-2025-14331  (opens in a new tab)
CWE-346  (opens in a new tab)

How to fix?

Upgrade Chainguard firefox-esr to version 140.6-r0 or higher.

NVD Description

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

Same-origin policy bypass in the Request Handling component. This vulnerability was fixed in Firefox 146, Firefox ESR 115.31, Firefox ESR 140.6, Thunderbird 146, and Thunderbird 140.6.

CVSS Base Scores

version 3.1