What is CVE-2026-102330?

CVE-2026-102330 is a medium-severity vulnerability in Google Chrome, classified under Incorrect Authorization. CVSS score: 6.5/10. Published 2026-09-29.

How severe is CVE-2026-102330?

Medium severity. CVSS v3 base score is 6.5 out of 10.

Auth bypass in Google Chrome

CVE-2026-102330

Incorrect authorization in SiteIsolation in Google Chrome prior to 154.0.8037.92 allowed a remote attacker who had compromised the renderer process to bypass web origin policy via a crafted HTML page. (Chromium security severity: Low)

Vulnerability class: Broken Access Control

Published 2026-09-29 · last modified 2026-09-30.

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N.

EPSS exploit prediction

No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.

Affected products

Google Chrome

Weakness classification (CWE)

CWE-863 — Incorrect Authorization

References

Frequently asked questions

What is CVE-2026-102330?: CVE-2026-102330 is a medium-severity vulnerability in Google Chrome, classified under Incorrect Authorization. CVSS score: 6.5/10. Published 2026-09-29.
How severe is CVE-2026-102330?: Medium severity. CVSS v3 base score is 6.5 out of 10.