Vulnerability · Published Jun 9, 2026 · Assigned by mozilla
CVE-2026-11799UXSS in Focus for iOS / Klar Webkit navigation
High 7.5
In plain English
A high-severity cross-site scripting in Focus for iOS from Mozilla. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 12% of all known vulnerabilities).
Severity (CVSS 3.1)7.5High
Exploit odds (30 days)0.2%top 88.0% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official 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.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Mozilla | Focus for iOS | see references |
| Mozilla | Klar for iOS | see references |
Weakness: CWE-79 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N