What is CVE-2026-9881?

CVE-2026-9881 is a critical-severity vulnerability in Apple macOS, classified under Use After Free. CVSS score: 9.0/10. Published 2026-05-28.

How severe is CVE-2026-9881?

Critical severity. CVSS v3 base score is 9.0 out of 10.

Use After Free in Apple macOS

CVE-2026-9881

Use after free in Bluetooth in Google Chrome on Mac prior to 148.0.7778.216 allowed an attacker who convinced a user to install a malicious extension to potentially perform a sandbox escape via a crafted Chrome Extension. (Chromium security severity: Critical)

Vulnerability class: Use-After-Free

Published 2026-05-28 · last modified 2026-07-21.

CVSS v3 metric

CVSS v3 base score 9.0 (Critical). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.003 (18.8th percentile), scored 2026-10-02.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 19th percentile — 18.8% 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: 0.003 · change: +0.001

Affected products

Apple macOS
Google Chrome — versions 148.0.7778.216

Weakness classification (CWE)

CWE-416 — Use After Free

References

chromereleases.googleblog.com/2026/05/stable-channel-update-for-desktop_0877304… (Release Notes)
issues.chromium.org/issues/505140741 (Permissions Required)

Frequently asked questions

What is CVE-2026-9881?: CVE-2026-9881 is a critical-severity vulnerability in Apple macOS, classified under Use After Free. CVSS score: 9.0/10. Published 2026-05-28.
How severe is CVE-2026-9881?: Critical severity. CVSS v3 base score is 9.0 out of 10.