CVE-2026-70309 MEDIUM

CVE-2026-70309: Microsoft Edge (Chromium-based) Security Feature Bypass Vulnerability

Vendor Microsoft
Product Microsoft Edge (Chromium-based)
Weakness CWE-346 · Origin validation
Published August 28, 2026
Last update September 8, 2026
View on NVD All CVEs

CVSS base score

5.4/10
Attack vector Network
Attack complexity Low
Privileges required None
User interaction Required
Confidentiality Low
Integrity Low

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N/E:U/RL:O/RC:C

What the vulnerability does

01Description

Origin validation error in Microsoft Edge (Chromium-based) allows an unauthorized attacker to bypass a security feature over a network.

Key dates

02Disclosure timeline

August 28, 2026 CVE published
September 8, 2026 Record updated