CVE-2026-11799 json
UXSS in Focus for iOS / Klar Webkit navigation
published 5mo ago modified 3mo ago also EUVD-2026-35837
- cvss
- 7.5
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.2%
- EPSS 0.2% chance of exploitation in 30 days, percentile 12%
- public exploits
- 0
- none known
Summary
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.
Patch / fix
- mozilla focus 151.3.1
- mozilla klar 151.3.1
Is CVE-2026-11799 in your stack? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.
Check with FencerCISA SSVC
- Exploitation
- none
- Automatable
- yes
- Technical impact
- partial
- Assessed
- 4mo ago
Exploit prediction
0.22% chance of exploitation in the next 30 days, higher than 12% of all scored CVEs (FIRST EPSS, 2026-11-09).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CISA ADP | 3.1 | 7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N |
| CNA | 3.1 | 7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N |
Affected products
- Mozilla Focus for iOS
- Mozilla Klar for iOS
Classification
- Weakness
-
- CWE-79 Improper Neutralization of Input During Web Page Generation
References
-
mozilla.org
/security/advisories/mfsa2026-55/
vendor-advisory
-
bugzilla.mozilla.org
/show_bug.cgi?id=1975667
permissions-required
Sources
- CVE List CVE-2026-11799
- NVD CVE-2026-11799
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