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CVE-2026-11799

UXSS in Focus for iOS / Klar Webkit navigation

HIGH
7.5
CVSS Score
Published: June 9, 2026 at 08:52 PM UTC
Updated: July 23, 2026 at 07:32 PM UTC
2 products affected across 1 vendorFocusKlar

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Severity
HIGH7.5
Exploit prediction
EPSS 0.2%
SSVC
No known exploit

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

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Focus· Mozilla
95%
v < 151.3.1
Vendor states this is fixed in 151.3.1 (unaffected)
Klar· Mozilla
95%
v < 151.3.1
Vendor states this is fixed in 151.3.1 (unaffected)

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (2)

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

SSVC — Action Prioritization

SSVCNo known exploitAutomatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

7.5HIGHCISA-ADP
Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
NONE
Availability
NONE
Vector?

Quick Info

StatusANALYZED
CWE
CWE-79

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