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9.8 Critical

CVE-2026-113399 Incorrect boundary conditions in the SVG component

Description

Incorrect boundary conditions in the SVG component. This vulnerability was fixed in Firefox 158.0.1 and Thunderbird 158.0.1.

Affected products and versions

Product	Affected versions	Fixed in
Firefox 158.0	earliest → < 158.0.1	158.0.1
Thunderbird 158.0	earliest → < 158.0.1	158.0.1

References

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

Timeline

Published October 20, 2026
Last modified October 29, 2026

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-2026-118024 Use-after-free in the Graphics: Text component 8.8 High CVE-2026-118025 Other issue in the SVG component 8.8 High

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