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9.3 Critical

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

Description

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

Affected products and versions

Product Affected versions Fixed in
Firefox 149 earliest → < 149 149
Thunderbird 149 earliest → < 149 149

Other CVEs of Firefox

The 2221 CVEs of Firefox →
CVE-2026-120572 Incorrect boundary conditions in the Layout: Block and Inline component 8.8 High CVE-2026-118027 Frame poisoning in the Layout component 9.1 Critical CVE-2026-118025 Other issue in the SVG component 8.8 High CVE-2026-118024 Use-after-free in the Graphics: Text component 8.8 High
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