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CVE-2026-4725 - Vulnerability Analysis

CriticalCVSS: 10.0

Last Updated: March 24, 2026

Firefox - Sandbox Escape

Published: March 24, 2026Updated: March 24, 2026Remote Exploitable

Overview

Firefox < 149 contains a use-after-free vulnerability caused by improper memory handling in the Graphics: Canvas2D component, letting attackers escape sandbox restrictions, exploit requires crafted content execution.

Severity & Score

Severity: Critical

CVSS Score: 10.0

Impact

Attackers can escape sandbox restrictions, potentially leading to full system compromise.

Mitigation

Update to version 149 or later.

References

https://bugzilla.mozilla.org/show_bug.cgi?id=2017108
https://www.mozilla.org/security/advisories/mfsa2026-20/

Related Resources

Vulnerability Intelligence Dashboard
Credential Scanner

Details

CVE ID: CVE-2026-4725
Severity: Critical
CVSS Score: 10.0
Type: use_after_free
Status: confirmed

CWE

CWE-416

CVSS Metrics

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H