CVE-2026-8971 Affecting firefox package, versions <151.0-1


Severity

Recommended
low

Based on default assessment until relevant scores are available.

Threat Intelligence

EPSS
0.21% (11th percentile)

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  • Snyk IDSNYK-DEBIANUNSTABLE-FIREFOX-16761410
  • published20 May 2026
  • disclosed19 May 2026

Introduced: 19 May 2026

CVE-2026-8971  (opens in a new tab)

How to fix?

Upgrade Debian:unstable firefox to version 151.0-1 or higher.

NVD Description

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

Same-origin policy bypass in the Networking: JAR component. This vulnerability was fixed in Firefox 151 and Thunderbird 151.

CVSS Base Scores

version 3.1