CVE-2024-9391 Affecting firefox-esr package, versions <131-r0


Severity

Recommended
low

Based on default assessment until relevant scores are available.

Threat Intelligence

EPSS
0.28% (20th percentile)

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  • Snyk IDSNYK-CHAINGUARDLATEST-FIREFOXESR-17764798
  • published1 Jul 2026
  • disclosed1 Oct 2024

Introduced: 1 Oct 2024

CVE-2024-9391  (opens in a new tab)

How to fix?

Upgrade Chainguard firefox-esr to version 131-r0 or higher.

NVD Description

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

A user who enables full-screen mode on a specially crafted web page could potentially be prevented from exiting full screen mode. This may allow spoofing of other sites as the address bar is no longer visible. This bug only affects Firefox Focus for Android. Other versions of Firefox are unaffected. This vulnerability affects Firefox < 131.

CVSS Base Scores

version 3.1