CVE-2026-11799

UXSS in Focus for iOS / Klar Webkit navigation

State: Published
Severity: 7.5 High
Published: Jun 9, 2026
Updated: Jun 10, 2026
Reserved: Jun 9, 2026

Description

UXSS in Focus for iOS / Klar Webkit navigation. This vulnerability was fixed in Focus for iOS 151.3.1 and Klar for iOS 151.3.1.

Scores

CVSS	Score	Vector	Source
3.1	7.5 High	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N	CISA-ADP

Weaknesses

CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Affected Products

Product	Versions
Focus for iOSMozilla	151.3.1 and laterNot affected
Klar for iOSMozilla	151.3.1 and laterNot affected

References

https://bugzilla.mozilla.org/show_bug.cgi?id=1975667
https://www.mozilla.org/security/advisories/mfsa2026-55/

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