CVE-2026-11799: UXSS in Focus for iOS / Klar Webkit navigation
Published Jun 9, 2026
·Updated
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.
Affected Software
8 affected components
Mozilla Focus for iOS<151.3.1
Mozilla Klar for iOS<151.3.1
All of the following
Mozilla Focus=151.3.1
Apple iOS
All of the following
Mozilla Klar=151.3.1
Apple iOS
Mozilla Focus Iphone Os<151.3.1
Mozilla Klar Iphone Os<151.3.1
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade
Focus for iOSto a version that resolves this vulnerability.Fixed in 151.3.1 - Upgrade
Upgrade
Klar for iOSto a version that resolves this vulnerability.Fixed in 151.3.1
Event History
Jun 9, 2026
CVE Published
via Mozilla·12:00 AM
Data Sourced
via Mozilla·12:00 AM
DescriptionSeverityAffected Software
CVE Published
via MITRE·08:52 PM
Data Sourced
via MITRE·08:52 PM
Description
Data Sourced
via NVD·09:17 PM
DescriptionSeverityWeaknessAffected Software
Frequently Asked Questions
1
What is the severity of CVE-2026-11799?
The severity of CVE-2026-11799 is high with a score of 7.
2
What products are affected by CVE-2026-11799?
CVE-2026-11799 affects Apple iOS, Mozilla Focus for iOS, and Mozilla Klar for iOS.
3
How do I fix CVE-2026-11799?
To fix CVE-2026-11799, update to Focus for iOS version 151.3.1 or Klar for iOS version 151.3.1.
4
What type of vulnerability is CVE-2026-11799?
CVE-2026-11799 is classified as an Unauthenticated Cross-Site Scripting (UXSS) vulnerability.
5
When was CVE-2026-11799 published?
CVE-2026-11799 was published on June 9, 2026.