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CVE-2023-4045 Offscreen Canvas did not properly track cross-origin tainting, which could have been used to access image data from…

Description

Offscreen Canvas did not properly track cross-origin tainting, which could have been used to access image data from another site in violation of same-origin policy. This vulnerability affects Firefox < 116, Firefox ESR < 102.14, and Firefox ESR < 115.1.

Affected products and versions

Product Affected versions Fixed in
Firefox 116 earliest → < 116 116
Firefox ESR 115.1 earliest → < 115.1 115.1

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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-2026-118026 Invalid pointer in the JavaScript: GC component 8.8 High
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