What is CVE-2026-9930?

CVE-2026-9930 is a medium-severity vulnerability in Apple Macos, classified under Out-of-bounds Write. CVSS score: 4.3/10. Published 2026-05-28.

How severe is CVE-2026-9930?

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

Buffer overflow in Apple Macos

CVE-2026-9930

Out of bounds write in Dawn in Google Chrome on Mac prior to 148.0.7778.216 allowed a remote attacker to perform an out of bounds memory write via a crafted HTML page. (Chromium security severity: High)

Vulnerability class: Buffer Overflow

EPSS: 0.000 (12.9th 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:N/I:L/A:N.

Affected products

Apple Macos
Google Chrome — versions 148.0.7778.216

Weakness classification (CWE)

CWE-787 — Out-of-bounds Write

References

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

Frequently asked questions

What is CVE-2026-9930?: CVE-2026-9930 is a medium-severity vulnerability in Apple Macos, classified under Out-of-bounds Write. CVSS score: 4.3/10. Published 2026-05-28.
How severe is CVE-2026-9930?: Medium severity. CVSS v3 base score is 4.3 out of 10.