CVE-2026-66317 MEDIUM

CVE-2026-66317: Microsoft Edge (Chromium-based) Tampering Vulnerability

Vendor Microsoft
Product Microsoft Edge (Chromium-based)
Weakness CWE-346 · Origin validation
Published August 3, 2026
Last update August 19, 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 perform tampering over a network.

Key dates

02Disclosure timeline

August 3, 2026 CVE published
August 19, 2026 Record updated