What is CVE-2026-11217?

CVE-2026-11217 is a medium-severity vulnerability in Apple Macos, classified under Origin Validation Error. CVSS score: 6.5/10. Published 2026-06-04.

How severe is CVE-2026-11217?

Medium severity. CVSS v3 base score is 6.5 out of 10.

Vulnerability in Apple Macos

CVE-2026-11217

Inappropriate implementation in Fenced Frames 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: Low)

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N.

Affected products

Apple Macos
Google Chrome — versions 149.0.7827.53
Linux Linux_kernel
Microsoft Windows

Weakness classification (CWE)

CWE-346 — Origin Validation Error

References

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

Frequently asked questions

What is CVE-2026-11217?: CVE-2026-11217 is a medium-severity vulnerability in Apple Macos, classified under Origin Validation Error. CVSS score: 6.5/10. Published 2026-06-04.
How severe is CVE-2026-11217?: Medium severity. CVSS v3 base score is 6.5 out of 10.