What is CVE-2026-11166?

CVE-2026-11166 is a medium-severity vulnerability in Apple macOS, classified under Cross-site Scripting. CVSS score: 6.8/10. Published 2026-06-04.

How severe is CVE-2026-11166?

Medium severity. CVSS v3 base score is 6.8 out of 10.

XSS in Apple macOS

CVE-2026-11166

Inappropriate implementation in SVG in Google Chrome prior to 149.0.7827.53 allowed a remote attacker to inject arbitrary scripts or HTML (UXSS) via a crafted HTML page. (Chromium security severity: Medium)

Vulnerability class: XSS (Cross-Site Scripting)

Published 2026-06-04 · last modified 2026-07-23.

CVSS v3 metric

CVSS v3 base score 6.8 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:N.

EPSS exploit prediction

EPSS: 0.002 (9.4th percentile), scored 2026-10-02.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 9th percentile — 9.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.002 · newest: 0.002 · change: 0.000

Affected products

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

chromereleases.googleblog.com/2026/06/stable-channel-update-for-desktop.html (Vendor Advisory)
issues.chromium.org/issues/502118936 (Permissions Required)

Frequently asked questions

What is CVE-2026-11166?: CVE-2026-11166 is a medium-severity vulnerability in Apple macOS, classified under Cross-site Scripting. CVSS score: 6.8/10. Published 2026-06-04.
How severe is CVE-2026-11166?: Medium severity. CVSS v3 base score is 6.8 out of 10.