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8.1 High

CVE-2025-9180 Same-origin policy bypass in the Graphics: Canvas2D component

Description

Same-origin policy bypass in the Graphics: Canvas2D component. This vulnerability was fixed in Firefox 142, Firefox ESR 115.27, Firefox ESR 128.14, Firefox ESR 140.2, Thunderbird 142, Thunderbird 128.14, and Thunderbird 140.2.

Affected products and versions

Product	Affected versions	Fixed in
Firefox 142	earliest → < 142	142
Firefox 140.2	earliest → < 140.2	140.2
Firefox 128.14	earliest → < 128.14	128.14
Firefox 115.27	earliest → < 115.27	115.27
Firefox ESR 140.2	earliest → < 140.2	140.2
Thunderbird 142	earliest → < 142	142
Thunderbird 140.2	earliest → < 140.2	140.2
Thunderbird 128.14	earliest → < 128.14	128.14

References

bugzilla.mozilla.org bugzilla.mozilla.org
www.mozilla.org www.mozilla.org
www.mozilla.org www.mozilla.org
www.mozilla.org www.mozilla.org
www.mozilla.org www.mozilla.org
www.mozilla.org www.mozilla.org
www.mozilla.org www.mozilla.org
www.mozilla.org www.mozilla.org

Timeline

Published August 19, 2025
Last modified April 13, 2026

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