Microsoft.aspnetcore.authentication.negotiate CVEs and Security Vulnerabilities

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CVE-2026-70179

ASP.NET Core Elevation of Privilege Vulnerability

Authentication bypass by spoofing in ASP.NET Core allows an authorized attacker to elevate privileges over a network.

CVSS 3.1 · 7.5 High EPSS < 1% KEV · Not listed

Vendors

Microsoft

Products

Microsoft.aspnetcore.authentication.negotiate Microsoft Visual Studio 2026 Version 18.10 Visual Studio 2022

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