CVE-2026-47303

ASP.NET Core Elevation of Privilege Vulnerability

State: Published
Severity: 8.8 High
Published: Jul 14, 2026
Updated: Nov 1, 2026
Reserved: May 18, 2026

Description

Authentication bypass by assumed-immutable data in ASP.NET Core allows an authorized attacker to elevate privileges over a network.

Scores

CVSS	Score	Vector	Source
3.1	8.8 High	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C	microsoft

Weaknesses

CWE-302 Authentication Bypass by Assumed-Immutable Data
CWE-863 Incorrect Authorization
CWE-90 Improper Neutralization of Special Elements used in an LDAP Query ('LDAP Injection')

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

ASP.NET Core Elevation of Privilege Vulnerabilityvendor-advisorypatch

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