What is CVE-2026-12440?

CVE-2026-12440 is a critical-severity vulnerability in Google Chrome, classified under Use After Free. CVSS score: 9.6/10. Published 2026-06-17.

How severe is CVE-2026-12440?

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

Use After Free in Google Chrome

CVE-2026-12440

Use after free in DigitalCredentials in Google Chrome on Windows prior to 149.0.7827.155 allowed a remote attacker to potentially perform a sandbox escape via a crafted HTML page. (Chromium security severity: Critical)

Vulnerability class: Use-After-Free

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

Google Chrome — versions 149.0.7827.155

Weakness classification (CWE)

CWE-416 — Use After Free

References

chrome-cve-admin@google.com
chrome-cve-admin@google.com

Frequently asked questions

What is CVE-2026-12440?: CVE-2026-12440 is a critical-severity vulnerability in Google Chrome, classified under Use After Free. CVSS score: 9.6/10. Published 2026-06-17.
How severe is CVE-2026-12440?: Critical severity. CVSS v3 base score is 9.6 out of 10.