What is CVE-2026-17659?

CVE-2026-17659 is a medium-severity vulnerability in Google Chrome, classified under Protection Mechanism Failure. CVSS score: 4.2/10. Published 2026-07-30.

How severe is CVE-2026-17659?

Medium severity. CVSS v3 base score is 4.2 out of 10.

Vulnerability in Google Chrome

CVE-2026-17659

Inappropriate implementation in SiteIsolation in Google Chrome prior to 151.0.7922.72 allowed a remote attacker who had compromised the renderer process to bypass site isolation via a crafted HTML page. (Chromium security severity: High)

CVSS v3 metric

CVSS v3 base score 4.2 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:N.

Affected products

Google Chrome — versions 151.0.7922.72

Weakness classification (CWE)

CWE-693 — Protection Mechanism Failure

References

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

Frequently asked questions

What is CVE-2026-17659?: CVE-2026-17659 is a medium-severity vulnerability in Google Chrome, classified under Protection Mechanism Failure. CVSS score: 4.2/10. Published 2026-07-30.
How severe is CVE-2026-17659?: Medium severity. CVSS v3 base score is 4.2 out of 10.