7.5

CVE-2026-11799: mozilla focus Cross-site Scripting

CVSS: 7.5v3.1HighAnalyzed
Published 09-06-2026Last modified 10-06-2026
Open JSON

Vulnerability summary

CVE-2026-11799 is a high (CVSS 7.5) Cross-site Scripting vulnerability in mozilla focus. EPSS estimates a 0.22% chance of exploitation in the next 30 days, higher than 11.1% of scored vulnerabilities.

Overall risk
30/100
0100
Medium · default modelHow is this calculated?
CVSS score
7.5/10
010
High · v3.1 (CVE.org)
EPSS score
0.22%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Timeline

  1. 09-06-2026
    PublishedVulnerability first disclosed.
  2. 10-06-2026
    Last modifiedVulnerability information updated.

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.

CVSS metrics

2 scores · 2 sources · 1 version

EPSS trend

Probability

0.22%

Chance of exploitation in the next 30 days

Percentile

11%

Versus all other CVEs

30-day change

0.00 pp

From 0.22% on 18-09-2026

18-09-202618-10-2026
EPSS score
0.22%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Mozilla2 products

1 vendor · 2 products

References

2 links