What is CVE-2026-11174?

CVE-2026-11174 is a medium-severity vulnerability in Apple Macos, classified under Protection Mechanism Failure. CVSS score: 5.3/10. Published 2026-06-04.

How severe is CVE-2026-11174?

Medium severity. CVSS v3 base score is 5.3 out of 10.

Vulnerability in Apple Macos

CVE-2026-11174

Inappropriate implementation in Site Isolation in Google Chrome prior to 149.0.7827.53 allowed a remote attacker who had compromised the renderer process to bypass site isolation via a crafted HTML page. (Chromium security severity: Medium)

EPSS: 0.002 (10.8th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:N/A:N.

Affected products

Apple Macos
Google Chrome — versions 149.0.7827.53
Linux Linux_kernel
Microsoft Windows

Weakness classification (CWE)

CWE-693 — Protection Mechanism Failure

References

chrome-cve-admin@google.com (Vendor Advisory)
chrome-cve-admin@google.com (Permissions Required)

Frequently asked questions

What is CVE-2026-11174?: CVE-2026-11174 is a medium-severity vulnerability in Apple Macos, classified under Protection Mechanism Failure. CVSS score: 5.3/10. Published 2026-06-04.
How severe is CVE-2026-11174?: Medium severity. CVSS v3 base score is 5.3 out of 10.