CVE-2026-50528

.NET Security Feature Bypass Vulnerability

State: Published
Severity: 8.2 High
Published: Jul 14, 2026
Updated: Nov 1, 2026
Reserved: Jun 4, 2026

Description

Incorrect authorization in .NET allows an unauthorized attacker to bypass a security feature over a network.

Scores

CVSS	Score	Vector	Source
3.1	8.2 High	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:N/E:U/RL:O/RC:C	microsoft

Weaknesses

CWE-863 Incorrect Authorization
CWE-302 Authentication Bypass by Assumed-Immutable Data
CWE-636 Not Failing Securely ('Failing Open')

Affected Products

Product	Versions
.NET 10.0 runtimeMicrosoft	10.0.0 to before 10.0.10Affected
.NET 8.0 runtimeMicrosoft	8.0.0 to before 8.0.29Affected
.NET 9.0 runtimeMicrosoft	9.0.0 to before 9.0.18Affected
Microsoft Visual Studio 2022 version 17.12Microsoft	17.12.0 to before 17.12.22Affected
Microsoft Visual Studio 2022 version 17.14Microsoft	17.14.0 to before 17.14.36Affected
Microsoft Visual Studio 2026 version 18.7Microsoft	18.0 to before 18.7.4Affected

References

.NET Security Feature Bypass Vulnerabilityvendor-advisorypatch

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