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Microsoft Security Response CenterCVE-2026-114146

ASP.NET Core Elevation of Privilege Vulnerability

HighVendor CVSS 9.0 / 10 1 CVE Published Nov 10, 2026 at 8:00 AM UTC
Get alerts for Microsoft.AspNetCore.Http.Connections

Summary

Incorrect authorization in ASP.NET Core allows an authorized attacker to elevate privileges over a network.

Products covered

  • Microsoft.AspNetCore.Http.Connections

  • .NET 8.0 installed on Windows

  • .NET 8.0 installed on Linux

  • .NET 8.0 installed on Mac OS

  • .NET 9.0 installed on Windows

  • .NET 9.0 installed on Linux

  • .NET 9.0 installed on Mac OS

  • .NET 10.0 installed on Windows

Show 8 more products

  • .NET 10.0 installed on Linux

  • .NET 10.0 installed on Mac OS

  • .NET 11.0 installed on Windows

  • .NET 11.0 installed on Linux

  • .NET 11.0 installed on Mac OS

  • Microsoft Visual Studio 2022 version 17.14

  • Microsoft Visual Studio 2026 version 18.11

  • Microsoft Visual Studio 2026 version 18.12

Remediation

Release Notes Install KB5135243. Install KB5135242. Install KB5135241.

Vendor-listed fixes

  • 1.2.14

  • 8.0.34

  • 9.0.23

  • 10.0.15

  • 11.0.0

  • 17.14.45

  • 18.11.4

  • 18.12.0

CVEs in this advisory 1

CVE-2026-114146

Updates

  1. Published by Microsoft Security Response Center

    The publication date reported by the vendor.

  2. Added to SecurityAlert

    We collected the advisory from the official source.

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