CVE-2026-4725
Received Received - Intake
Use-After-Free in Firefox Canvas2D Enables Sandbox Escape

Publication date: 2026-03-24

Last updated on: 2026-04-13

Assigner: Mozilla Corporation

Description
Sandbox escape due to use-after-free in the Graphics: Canvas2D component. This vulnerability was fixed in Firefox 149 and Thunderbird 149.
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Meta Information
Published
2026-03-24
Last Modified
2026-04-13
Generated
2026-06-16
AI Q&A
2026-03-24
EPSS Evaluated
2026-06-15
NVD
CVE-2026-4725
EUVD
EUVD-2026-14865
Affected Vendors & Products
Showing 1 associated CPE
Vendor Product Version / Range
mozilla firefox to 149.0 (exc)
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Exploitability
CWE
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KEV
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CWE ID Description
CWE-416 The product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.
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Executive Summary

This vulnerability is a sandbox escape caused by a use-after-free issue in the Graphics: Canvas2D component of Firefox versions earlier than 149.

Impact Analysis

Exploitation of this vulnerability could allow an attacker to escape the browser's sandbox, potentially leading to execution of arbitrary code or unauthorized access to system resources.

Compliance Impact

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Detection Guidance

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Mitigation Strategies

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