CVE-2026-4715: Uninitialized memory in the Graphics: Canvas2D component

Published Mar 24, 2026
·
Updated

Uninitialized memory in the Graphics: Canvas2D component. This vulnerability affects Firefox < 149 and Firefox ESR < 140.9.

Other sources

Uninitialized memory in the Graphics: Canvas2D component. This vulnerability was fixed in Firefox 149, Firefox ESR 140.9, Thunderbird 149, and Thunderbird 140.9.

— MITRE

Affected Software

8 affected componentsFixes available
Mozilla Firefox<149
Mozilla Firefox ESR<140.9
Mozilla Firefox<149
149
Mozilla Firefox ESR<140.9
140.9
Mozilla Firefox<140.9.0
Mozilla Firefox<149.0
Mozilla Thunderbird<140.9
140.9
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 Red Hat·01:02 PM
DescriptionSeverityAffected Software
Data Sourced
via NVD·01:16 PM
DescriptionSeverityWeaknessAffected Software
Apr 7, 58249
Event
via FIRST·12:07 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-2026-4715?

CVE-2026-4715 has been classified as a moderate severity vulnerability affecting the Graphics: Canvas2D component.

2

How do I fix CVE-2026-4715?

To fix CVE-2026-4715, users should upgrade to Firefox version 149 or later, or Firefox ESR version 140.9 or later.

3

What does CVE-2026-4715 affect?

CVE-2026-4715 affects versions of Mozilla Firefox prior to 149 and Mozilla Firefox ESR prior to 140.9.

4

What type of vulnerability is CVE-2026-4715?

CVE-2026-4715 is an uninitialized memory vulnerability found in the Graphics: Canvas2D component.

5

Can CVE-2026-4715 be exploited remotely?

CVE-2026-4715 may allow attackers to exploit uninitialized memory in certain scenarios, potentially leading to security risks.

Company

Resources

Contact

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