Authentication Bypass by Assumed-Immutable Data in Microsoft products - CVE-2026-47303
Published: July 15, 2026
Vulnerability identifier: #VU137777
CSH Severity: Medium
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2026-47303
CWE-ID: CWE-302
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: Microsoft
Affected software:
.NET for Linux
.NET for macOS
Visual Studio
.NET
.NET for Linux
.NET for macOS
Visual Studio
.NET
Detailed vulnerability description
The vulnerability allows a remote attacker to escalate privileges.
The vulnerability exists due to authentication bypass by assumed-immutable data in ASP.NET Core. A remote user can gain elevated privileges on the target system.
How to mitigate CVE-2026-47303
Install updates from vendor's website.