What is CVE-2026-11266?

CVE-2026-11266 is a medium-severity vulnerability in Apple macOS, classified under Protection Mechanism Failure. CVSS score: 4.3/10. Published 2026-06-05.

How severe is CVE-2026-11266?

Medium severity. CVSS v3 base score is 4.3 out of 10.

Vulnerability in Apple macOS

CVE-2026-11266

Inappropriate implementation in SafeBrowsing in Google Chrome prior to 149.0.7827.53 allowed a remote attacker to bypass Safe Browsing via a malicious file. (Chromium security severity: Low)

Published 2026-06-05 · last modified 2026-07-23.

CVSS v3 metric

CVSS v3 base score 4.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N.

EPSS exploit prediction

EPSS: 0.002 (5.5th percentile), scored 2026-10-01.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 5th percentile — 5.5% 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-693 — Protection Mechanism Failure

References

chromereleases.googleblog.com/2026/06/stable-channel-update-for-desktop.html (Vendor Advisory)
issues.chromium.org/issues/500521311 (Permissions Required)

Frequently asked questions

What is CVE-2026-11266?: CVE-2026-11266 is a medium-severity vulnerability in Apple macOS, classified under Protection Mechanism Failure. CVSS score: 4.3/10. Published 2026-06-05.
How severe is CVE-2026-11266?: Medium severity. CVSS v3 base score is 4.3 out of 10.