CVE-2026-96196: Microsoft Edge (Chromium-based) Security Feature Bypass Vulnerability

Overview

Severity
High (CVSS 8.8)
CVSS Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Category
Security Feature Bypass
Exploit Status
Not Exploited
Patch Tuesday
2026-Oct
Released
2026-10-27

Description

Incomplete list of disallowed inputs in Microsoft Edge (Chromium-based) allows an unauthorized attacker to bypass a security feature over a network.

FAQ

What kind of security feature could be bypassed by successfully exploiting this vulnerability? Successful exploitation could bypass the path validation safeguards that check which files may be changed and require user approval for sensitive locations, allowing changes to protected files without the user’s knowledge or consent. According to the CVSS metric, user interaction is required (UI:R). What interaction would the user have to do? The user must open or load attacker‑controlled content—such as importing a malicious WSDL or opening a file—so the application processes it and triggers the vulnerability.

Affected Products (1)

Browser

  • Microsoft Edge (Chromium-based)

Security Updates (1)

Acknowledgments

Edge Security with Microsoft

Revision History

  • 2026-10-27: Information published.