Insufficient Compartmentalization Affecting firefox package, versions <0:153.5.0-1.el10_2


Severity

Recommended
high

Based on Red Hat Enterprise Linux security rating.

Threat Intelligence

EPSS
0.35% (28th percentile)

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  • Snyk IDSNYK-RHEL10-FIREFOX-22098646
  • published31 Oct 2026
  • disclosed13 Oct 2026

Introduced: 13 Oct 2026

NewCVE-2026-109740  (opens in a new tab)
CWE-653  (opens in a new tab)

How to fix?

Upgrade RHEL:10 firefox to version 0:153.5.0-1.el10_2 or higher.
This issue was patched in RHSA-2026:89758.

NVD Description

Note: Versions mentioned in the description apply only to the upstream firefox package and not the firefox package as distributed by RHEL. See How to fix? for RHEL:10 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