Microsoft Security Advisory CVE-2026-70179 - ASP.NET Core Elevation of Privilege Vulnerability

Date Oct 13, 2026
Type Vendor advisory
Signal High-risk advisory
Vendor / Product NuGet ยท Microsoft.AspNetCore.Authentication.Negotiate
CVE CVE-2026-70179
High-risk advisory CVE-2026-70179

Summary

Microsoft Security Advisory CVE-2026-70179 - ASP.NET Core Elevation of Privilege Vulnerability

Why it matters

GitHub has published a reviewed security advisory for Microsoft.AspNetCore.Authentication.Negotiate. Prioritize it with other application dependency updates.

Operator check

Check whether Microsoft.AspNetCore.Authentication.Negotiate is present in application dependency manifests, lockfiles, or build images. Review the GitHub advisory and upgrade to a patched version where available.

Sources

PatchBrief uses public sources. It does not scan environments, verify exposure, or replace vendor guidance.