CVE-2025-5266 Affecting firefox-x11 package, versions <0:128.11.0-1.el9_6.alma.1


Severity

Recommended
high

Based on AlmaLinux security rating.

Threat Intelligence

EPSS
0.04% (10th percentile)

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  • Snyk IDSNYK-ALMALINUX9-FIREFOXX11-10265065
  • published30 May 2025
  • disclosed29 May 2025

Introduced: 29 May 2025

NewCVE-2025-5266  (opens in a new tab)

How to fix?

Upgrade AlmaLinux:9 firefox-x11 to version 0:128.11.0-1.el9_6.alma.1 or higher.
This issue was patched in ALSA-2025:8293.

NVD Description

Note: Versions mentioned in the description apply only to the upstream firefox-x11 package and not the firefox-x11 package as distributed by AlmaLinux. See How to fix? for AlmaLinux:9 relevant fixed versions and status.

Script elements loading cross-origin resources generated load and error events which leaked information enabling XS-Leaks attacks. This vulnerability affects Firefox < 139 and Firefox ESR < 128.11.

CVSS Base Scores

version 3.1