CVE-2026-11799

Name: CVE-2026-11799
Creator: NVD / NIST
Published: 2026-06-09T21:17:03.41+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.5/10EPSS 0.22%

Last modified Jun 17, 2026

CVE-2026-11799 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. 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.. EPSS estimates a 0.22% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

7.5/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

EPSS Probability

0.22%

11.9th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-79

Affected Software

Vendor	Product	Versions
Mozilla	Focus	< 151.3.1
Mozilla	Klar	< 151.3.1

References

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

Timeline

Published: Jun 9, 2026
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2026-11799?

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.

How severe is CVE-2026-11799?

CVE-2026-11799 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 0.22% probability of exploitation in the next 30 days.

How do I fix CVE-2026-11799?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2026-11799?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST