CVE-2026-4725: Sandbox escape due to use-after-free in the Graphics: Canvas2D component

Published Mar 24, 2026
·
Updated

Sandbox escape due to use-after-free in the Graphics: Canvas2D component. This vulnerability was fixed in Firefox 149 and Thunderbird 149.

Affected Software

4 affected componentsFixes available
Mozilla Firefox<149
Mozilla Firefox<149
149
Mozilla Firefox<149.0
Mozilla Thunderbird<149
149

Event History

Mar 24, 2026
CVE Published
via Mozilla·12:00 AM
Data Sourced
via Mozilla·12:00 AM
DescriptionSeverityAffected Software
Updated
via Mozilla·12:00 AM
Affected Software
CVE Published
via MITRE·12:30 PM
Data Sourced
via MITRE·12:30 PM
Description
Data Sourced
via NVD·01:16 PM
DescriptionSeverityWeaknessAffected Software
Apr 7, 58249
Event
via FIRST·12:22 PM

Parent advisories

This vulnerability appears in the following advisories.

Peer vulnerabilities

Found alongside the following vulnerabilities.

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Frequently Asked Questions

1

What is the severity of CVE-2026-4725?

CVE-2026-4725 is considered a critical vulnerability due to its potential for sandbox escape.

2

How do I fix CVE-2026-4725?

To fix CVE-2026-4725, upgrade to Firefox version 149 or later.

3

What components are impacted by CVE-2026-4725?

CVE-2026-4725 affects the Graphics: Canvas2D component of Firefox.

4

What versions of Firefox are affected by CVE-2026-4725?

CVE-2026-4725 affects all Firefox versions prior to 149.

5

Can CVE-2026-4725 be exploited remotely?

Yes, CVE-2026-4725 can be exploited remotely due to the nature of the sandbox escape.

Company

Resources

Contact

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