CVE-2026-2778 Affecting firefox-debuginfo package, versions <0:140.8.0-2.el9_7


Severity

Recommended
high

Based on Rocky Linux security rating.

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  • Snyk IDSNYK-ROCKY9-FIREFOXDEBUGINFO-15361144
  • published27 Feb 2026
  • disclosed24 Feb 2026

Introduced: 24 Feb 2026

NewCVE-2026-2778  (opens in a new tab)

How to fix?

Upgrade Rocky-Linux:9 firefox-debuginfo to version 0:140.8.0-2.el9_7 or higher.
This issue was patched in RLSA-2026:3339.

NVD Description

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

Sandbox escape due to incorrect boundary conditions in the DOM: Core & HTML component. This vulnerability affects Firefox < 148, Firefox ESR < 115.33, Firefox ESR < 140.8, Thunderbird < 148, and Thunderbird < 140.8.

CVSS Base Scores

version 3.1