What is CVE-2026-9886?

CVE-2026-9886 is a critical-severity vulnerability in Apple Macos, classified under Use After Free. CVSS score: 9.6/10. Published 2026-05-28.

How severe is CVE-2026-9886?

Critical severity. CVSS v3 base score is 9.6 out of 10.

Use After Free in Apple Macos

CVE-2026-9886

Use after free in Base in Google Chrome on Mac prior to 148.0.7778.216 allowed a remote attacker to potentially perform a sandbox escape via a crafted HTML page. (Chromium security severity: Critical)

Vulnerability class: Use-After-Free

EPSS: 0.001 (30.2th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 9.6 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H.

Affected products

Apple Macos
Google Chrome — versions 148.0.7778.216

Weakness classification (CWE)

CWE-416 — Use After Free

References

chrome-cve-admin@google.com (Release Notes)
chrome-cve-admin@google.com (Permissions Required)

Frequently asked questions

What is CVE-2026-9886?: CVE-2026-9886 is a critical-severity vulnerability in Apple Macos, classified under Use After Free. CVSS score: 9.6/10. Published 2026-05-28.
How severe is CVE-2026-9886?: Critical severity. CVSS v3 base score is 9.6 out of 10.