What is CVE-2026-9116?

CVE-2026-9116 is a medium-severity vulnerability in Apple Macos, classified under Protection Mechanism Failure. CVSS score: 4.3/10. Published 2026-05-20.

How severe is CVE-2026-9116?

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

Vulnerability in Apple Macos

CVE-2026-9116

Insufficient policy enforcement in ServiceWorker in Google Chrome on prior to 148.0.7778.179 allowed a remote attacker to leak cross-origin data via a crafted HTML page. (Chromium security severity: High)

EPSS: 0.000 (10.6th percentile) — read the EPSS interpretation.

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:L/I:N/A:N.

Affected products

Apple Macos
Google Chrome — versions 148.0.7778.179
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-2026-9116?: CVE-2026-9116 is a medium-severity vulnerability in Apple Macos, classified under Protection Mechanism Failure. CVSS score: 4.3/10. Published 2026-05-20.
How severe is CVE-2026-9116?: Medium severity. CVSS v3 base score is 4.3 out of 10.