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8.8 High

CVE-2026-120572 Incorrect boundary conditions in the Layout: Block and Inline component

Description

Incorrect boundary conditions in the Layout: Block and Inline component. This vulnerability was fixed in Firefox 159.0.1.

Affected products and versions

Product	Affected versions	Fixed in
Firefox 159.0	earliest → < 159.0.1	159.0.1

References

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

Timeline

Published November 3, 2026
Last modified November 3, 2026

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