CVE-2026-109740 Affecting firefox package, versions <0:153.5.0-1.el8_10


Severity

Recommended
high

Based on AlmaLinux security rating.

Threat Intelligence

EPSS
0.35% (28th percentile)

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  • Snyk IDSNYK-ALMALINUX8-FIREFOX-22191006
  • published4 Nov 2026
  • disclosed26 Oct 2026

Introduced: 26 Oct 2026

NewCVE-2026-109740  (opens in a new tab)

How to fix?

Upgrade AlmaLinux:8 firefox to version 0:153.5.0-1.el8_10 or higher.
This issue was patched in ALSA-2026:89756.

NVD Description

Note: Versions mentioned in the description apply only to the upstream firefox package and not the firefox package as distributed by AlmaLinux. See How to fix? for AlmaLinux:8 relevant fixed versions and status.

Sandbox escape due to incorrect boundary conditions in the Widget: Win32 component. This vulnerability was fixed in Firefox 158, Firefox ESR 153.5, Thunderbird 158, and Thunderbird 153.5.

CVSS Base Scores

version 3.1