What is CVE-2026-62904?

CVE-2026-62904 is a medium-severity vulnerability in Microsoft Edge (Chromium-Based), classified under Incorrect Authorization. CVSS score: 5.4/10. Published 2026-08-28.

How severe is CVE-2026-62904?

Medium severity. CVSS v3 base score is 5.4 out of 10.

Auth bypass in Microsoft Edge (Chromium-Based)

CVE-2026-62904

Incorrect authorization in Microsoft Edge (Chromium-based) allows an unauthorized attacker to disclose information over a network.

Vulnerability class: Broken Access Control

CVSS v3 metric

CVSS v3 base score 5.4 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N.

Affected products

Microsoft Edge (Chromium-based)

Weakness classification (CWE)

CWE-863 — Incorrect Authorization

References

secure@microsoft.com (vendor-advisory, patch)

Frequently asked questions

What is CVE-2026-62904?: CVE-2026-62904 is a medium-severity vulnerability in Microsoft Edge (Chromium-Based), classified under Incorrect Authorization. CVSS score: 5.4/10. Published 2026-08-28.
How severe is CVE-2026-62904?: Medium severity. CVSS v3 base score is 5.4 out of 10.