---
id: "CVE-2026-114157"
page: "https://infrastack.ai/live/CVE-2026-114157"
kind: "vulnerability"
aliases: ["CVE-2026-114157", "GHSA-7phj-vgxq-r67h"]
title: "Microsoft Security Advisory CVE-2026-114157 - ASP.NET Core Security Feature Bypass Vulnerability"
severity: "high"
cvss: 7.5
epss: null
exploited: false
status: "open"
category: "runtime"
products: [{"name": "Microsoft.AspNetCore.App", "fixed": ["8.0.34", "9.0.23", "10.0.15", "11.0.0"], "affected": ">= 8.0.0, < 8.0.34; >= 9.0.0, < 9.0.23; >= 10.0.0, < 10.0.15; >= 11.0.0-preview.1, < 11.0.0", "ecosystem": "dotnet"}, {"name": "Visual Studio 2022 17.14", "fixed": ["17.14.45"], "affected": ">= 17.14.0, < 17.14.45", "ecosystem": "vendor"}, {"name": "Microsoft.AspNetCore.App.Runtime.win-arm64", "fixed": ["8.0.34"], "affected": ">= 8.0.0-preview.1.23112.2, <= 8.0.33", "ecosystem": "nuget"}, {"name": "Microsoft.AspNetCore.App.Runtime.win-x64", "fixed": ["8.0.34"], "affected": ">= 8.0.0-preview.1.23112.2, <= 8.0.33", "ecosystem": "nuget"}, {"name": "Microsoft.AspNetCore.App.Runtime.win-x86", "fixed": ["8.0.34"], "affected": ">= 8.0.0-preview.1.23112.2, <= 8.0.33", "ecosystem": "nuget"}, {"name": "Microsoft.AspNetCore.App.Runtime.win-arm64", "fixed": ["9.0.23"], "affected": ">= 9.0.0-preview.1.24081.5, <= 9.0.22", "ecosystem": "nuget"}, {"name": "Microsoft.AspNetCore.App.Runtime.win-x64", "fixed": ["9.0.23"], "affected": ">= 9.0.0-preview.1.24081.5, <= 9.0.22", "ecosystem": "nuget"}, {"name": "Microsoft.AspNetCore.App.Runtime.win-x86", "fixed": ["9.0.23"], "affected": ">= 9.0.0-preview.1.24081.5, <= 9.0.22", "ecosystem": "nuget"}, {"name": "Microsoft.AspNetCore.App.Runtime.win-arm64", "fixed": ["10.0.15"], "affected": ">= 10.0.0-preview.1.25120.3, <= 10.0.14", "ecosystem": "nuget"}, {"name": "Microsoft.AspNetCore.App.Runtime.win-x64", "fixed": ["10.0.15"], "affected": ">= 10.0.0-preview.1.25120.3, <= 10.0.14", "ecosystem": "nuget"}, {"name": "Microsoft.AspNetCore.App.Runtime.win-x86", "fixed": ["10.0.15"], "affected": ">= 10.0.0-preview.1.25120.3, <= 10.0.14", "ecosystem": "nuget"}, {"name": "Microsoft.AspNetCore.App.Runtime.win-arm64", "fixed": ["11.0.0"], "affected": ">= 11.0.0-preview.1.26104.118, <= 11.0.0-rc.3.26522.148", "ecosystem": "nuget"}, {"name": "Microsoft.AspNetCore.App.Runtime.win-x64", "fixed": ["11.0.0"], "affected": ">= 11.0.0-preview.1.26104.118, <= 11.0.0-rc.3.26522.148", "ecosystem": "nuget"}, {"name": "Microsoft.AspNetCore.App.Runtime.win-x86", "fixed": ["11.0.0"], "affected": ">= 11.0.0-preview.1.26104.118, <= 11.0.0-rc.3.26522.148", "ecosystem": "nuget"}]
ecosystems: ["dotnet", "nuget", "vendor"]
tags: ["aspnet-core", "cwe-362", "dotnet", "local", "runtime", "self-hosted", "windows"]
not_affected_if: ["default-config", "no-named-pipes", "non-windows", "tcp-only"]
published_at: "2026-11-10T19:19:09+00:00"
first_seen_at: "2026-11-10T19:24:43+00:00"
updated_at: "2026-11-11T00:31:51+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-114157", "first_seen_at": "2026-11-10T19:24:43+00:00"}, {"source": "analyst", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-114157", "first_seen_at": "2026-11-10T23:43:08+00:00", "cites": ["https://nvd.nist.gov/vuln/detail/CVE-2026-114157", "https://devblogs.microsoft.com/dotnet/dotnet-and-dotnet-framework-november-2026-servicing-updates/"]}, {"source": "ghsa", "url": "https://github.com/advisories/GHSA-7phj-vgxq-r67h", "first_seen_at": "2026-11-11T00:29:54+00:00"}]
exploit_sources: []
---

# Microsoft Security Advisory CVE-2026-114157 - ASP.NET Core Security Feature Bypass Vulnerability

Link for people: https://infrastack.ai/live/CVE-2026-114157 (this .md is for agents)

A Kestrel named-pipe listener configured with CurrentUserOnly can lose ownership of its protected pipe namespace during recovery. Another local user on the same Windows machine can then claim the pipe path and intercept traffic meant for the application.

_Summary, check and fix written by a model from the sources; labelled as such._

## Affected

- dotnet:Microsoft.AspNetCore.App affected >= 8.0.0, < 8.0.34; >= 9.0.0, < 9.0.23; >= 10.0.0, < 10.0.15; >= 11.0.0-preview.1, < 11.0.0 fixed 8.0.34, 9.0.23, 10.0.15, 11.0.0
- vendor:Visual Studio 2022 17.14 affected >= 17.14.0, < 17.14.45 fixed 17.14.45
- nuget:Microsoft.AspNetCore.App.Runtime.win-arm64 affected >= 8.0.0-preview.1.23112.2, <= 8.0.33 fixed 8.0.34
- nuget:Microsoft.AspNetCore.App.Runtime.win-x64 affected >= 8.0.0-preview.1.23112.2, <= 8.0.33 fixed 8.0.34
- nuget:Microsoft.AspNetCore.App.Runtime.win-x86 affected >= 8.0.0-preview.1.23112.2, <= 8.0.33 fixed 8.0.34
- nuget:Microsoft.AspNetCore.App.Runtime.win-arm64 affected >= 9.0.0-preview.1.24081.5, <= 9.0.22 fixed 9.0.23
- nuget:Microsoft.AspNetCore.App.Runtime.win-x64 affected >= 9.0.0-preview.1.24081.5, <= 9.0.22 fixed 9.0.23
- nuget:Microsoft.AspNetCore.App.Runtime.win-x86 affected >= 9.0.0-preview.1.24081.5, <= 9.0.22 fixed 9.0.23
- nuget:Microsoft.AspNetCore.App.Runtime.win-arm64 affected >= 10.0.0-preview.1.25120.3, <= 10.0.14 fixed 10.0.15
- nuget:Microsoft.AspNetCore.App.Runtime.win-x64 affected >= 10.0.0-preview.1.25120.3, <= 10.0.14 fixed 10.0.15
- nuget:Microsoft.AspNetCore.App.Runtime.win-x86 affected >= 10.0.0-preview.1.25120.3, <= 10.0.14 fixed 10.0.15
- nuget:Microsoft.AspNetCore.App.Runtime.win-arm64 affected >= 11.0.0-preview.1.26104.118, <= 11.0.0-rc.3.26522.148 fixed 11.0.0
- nuget:Microsoft.AspNetCore.App.Runtime.win-x64 affected >= 11.0.0-preview.1.26104.118, <= 11.0.0-rc.3.26522.148 fixed 11.0.0
- nuget:Microsoft.AspNetCore.App.Runtime.win-x86 affected >= 11.0.0-preview.1.26104.118, <= 11.0.0-rc.3.26522.148 fixed 11.0.0

## How to check

- Check the ASP.NET Core runtime version with `dotnet --list-runtimes` and compare it with the affected intervals.
- Look for Kestrel named-pipe listeners configured with `CurrentUserOnly` in the application code.
- For self-contained apps, check the runtime version embedded in the published output, since machine-wide updates do not replace it.

## Fix

- Microsoft.AspNetCore.App 8.0 line: `8.0.34`
- Microsoft.AspNetCore.App 9.0 line: `9.0.23`
- Microsoft.AspNetCore.App 10.0 line: `10.0.15`
- Microsoft.AspNetCore.App 11.0: `11.0.0`
- Visual Studio 2022 17.14: `17.14.45`

## Timeline

- 2026-11-10T19:24:43+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-114157
- 2026-11-10T23:43:08+00:00 analyst https://nvd.nist.gov/vuln/detail/CVE-2026-114157 — NVD (Microsoft CNA) lists affected/fixed versions; Microsoft's Nov 2026 servicing blog confirms fixed releases. Microsoft blog labels it 'Security Feature Bypass' while CVE text says local elevation of privilege - mismatch. MSRC page not readable; no exploitation or PoC found. Not checked: X/social.
- 2026-11-11T00:29:54+00:00 ghsa https://github.com/advisories/GHSA-7phj-vgxq-r67h

## Documents

- [advisory] NVD CVE-2026-114157 (Microsoft CNA data) https://nvd.nist.gov/vuln/detail/CVE-2026-114157
- [advisory] Maintainer's advisory: github.com https://github.com/dotnet/aspnetcore/security/advisories/GHSA-7phj-vgxq-r67h
- [advisory] Maintainer's advisory: api.github.com https://api.github.com/repos/dotnet/aspnetcore/security-advisories/GHSA-7phj-vgxq-r67h
- [fix] .NET and .NET Framework November 2026 servicing updates https://devblogs.microsoft.com/dotnet/dotnet-and-dotnet-framework-november-2026-servicing-updates/
- [fix] Release: github.com https://github.com/dotnet/aspnetcore/releases/tag/v11.0.0
- [fix] Release: github.com https://github.com/dotnet/aspnetcore/releases/tag/v8.0.34
- [fix] Release: github.com https://github.com/dotnet/aspnetcore/releases/tag/v9.0.23
- [fix] Patch: github.com https://github.com/dotnet/aspnetcore/commit/671bb7f9c84e24153ac8440e4e6de307a6cbd920
- [fix] Patch: github.com https://github.com/dotnet/aspnetcore/commit/a4ade6a6848f06681af1a57b5a7b555647d3e19d
- [fix] Release: github.com https://github.com/dotnet/aspnetcore/releases/tag/v10.0.15

## From the sources

## Executive summary

Microsoft is releasing this security advisory to provide information about a vulnerability in ASP.NET Core's Kestrel Named Pipes transport. This advisory provides guidance on updating affected applications and components.

A Kestrel named-pipe listener configured with `CurrentUserOnly` can lose protected namespace ownership during recovery, allowing another local user to claim the pipe path.

## Announcement

Announcement for this issue can be found at https://github.com/dotnet/announcements/issues/507

## CVSS Details

- **Version:** 3.1
- **Severity:** High
- **Score:** 7.5 (base score)
- **Vector:** `CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:N/E:U/RL:O/RC:C`
- **Weakness:** CWE-362
- **MSRC severity:** Important
- **Impact:** Security Feature Bypass

## Affected Platforms

- **Platforms:** Windows
- **Architectures:** Arm64, x64, x86

## <a name="affected-packages"></a>Affected Packages

Microsoft.AspNetCore.Server.Kestrel.Transport.NamedPipes ships in the ASP.NET Core shared framework and runtime packs; it is not a separately packable NuGet package.

Affected intervals and patched release versions are listed below.

### .NET 8.0 - affected runtime packages

Package | Affected version | Patched version
--- | --- | ---
[Microsoft.AspNetCore.App.Runtime.win-arm64](https://www.nuget.org/packages/Microsoft.AspNetCore.App.Runtime.win-arm64) | >= 8.0.0-preview.1.23112.2, <= 8.0.33 | 8.0.34
[Microsoft.AspNetCore.App.Runtime.win-x64](https://www.nuget.org/packages/Microsoft.AspNetCore.App.Runtime.win-x64) | >= 8.0.0-preview.1.23112.2, <= 8.0.33 | 8.0.34
[Microsoft.AspNetCore.App.Runtime.win-x86](https://www.nuget.org/packages/Microsoft.AspNetCore.App.Runtime.win-x86) | >= 8.0.0-preview.1.23112.2, <= 8.0.33 | 8.0.34

### .NET 9.0 - affected runtime packages

Package | Affected version | Patched version
--- | --- | ---
[Microsoft.AspNetCore.App.Runtime.win-arm64](https://www.nuget.org/packages/Microsoft.AspNetCore.App.Runtime.win-arm64) | >= 9.0.0-preview.1.24081.5, <= 9.0.22 | 9.0.23
[Microsoft.AspNetCore.App.Runtime.win-x64](https://www.nuget.org/packages/Microsoft.AspNetCore.App.Runtime.win-x64) | >= 9.0.0-preview.1.24081.5, <= 9.0.22 | 9.0.23
[Microsoft.AspNetCore.App.Runtime.win-x86](https://www.nuget.org/packages/Microsoft.AspNetCore.App.Runtime.win-x86) | >= 9.0.0-preview.1.24081.5, <= 9.0.22 | 9.0.23

### .NET 10.0 - affected runtime packages

Package | Affected version | Patched version
--- | --- | ---
[Microsoft.AspNetCore.App.Runtime.win-arm64](https://www.nuget.org/packages/Microsoft.AspNetCore.App.Runtime.win-arm64) | >= 10.0.0-preview.1.25120.3, <= 10.0.14 | 10.0.15
[Microsoft.AspNetCore.App.Runtime.win-x64](https://www.nuget.org/packages/Microsoft.AspNetCore.App.Runtime.win-x64) | >= 10.0.0-preview.1.25120.3, <= 10.0.14 | 10.0.15
[Microsoft.AspNetCore.App.Runtime.win-x86](https://www.nuget.org/packages/Microsoft.AspNetCore.App.Runtime.win-x86) | >= 10.0.0-preview.1.25120.3, <= 10.0.14 | 10.0.15

### .NET 11.0 - affected runtime packages

Package | Affected version | Patched version
--- | --- | ---
[Microsoft.AspNetCore.App.Runtime.win-arm64](https://www.nuget.org/packages/Microsoft.AspNetCore.App.Runtime.win-arm64) | >= 11.0.0-preview.1.26104.118, <= 11.0.0-rc.3.26522.148 | 11.0.0
[Microsoft.AspNetCore.App.Runtime.win-x64](https://www.nuget.org/packages/Microsoft.AspNetCore.App.Runtime.win-x64) | >= 11.0.0-preview.1.26104.118, <= 11.0.0-rc.3.26522.148 | 11.0.0
[Microsoft.AspNetCore.App.Runtime.win-x86](https://www.nuget.org/packages/Microsoft.AspNetCore.App.Runtime.win-x86) | >= 11.0.0-preview.1.26104.118, <= 11.0.0-rc.3.26522.148 | 11.0.0

The .NET 11.0.0 release is fixed; affected prereleases are listed above.

## Advisory FAQ

### <a name="how-affected"></a>How do I know if I am affected?

Review Windows applications that use Kestrel's Named Pipes transport and identify their deployed ASP.NET Core versions. Compare deployed versions with the affected intervals above. Self-contained applications include their own framework; updating a machine-wide installation does not replace their embedded copies.

### <a name="how-fix"></a>How do I fix the issue?

Install the applicable ASP.NET Core runtime update and restart applications. Rebuild and redeploy affected self-contained applications with fixed runtime packs. An SDK update alone does not replace runtime or framework files already embedded in deployed applications. Use the patched version listed for the affected servicing line.

## Other Information

### Reporting Security Issues

If you have found a potential security issue in a supported version of .NET, please report it to the Microsoft Security Response Center (MSRC) via the [MSRC Researcher Portal](https://msrc.microsoft.com/report/vulnerability/new). Further information can be found in the MSRC [Report an Issue FAQ](https://www.microsoft.com/msrc/faqs-report-an-issue).

Security reports made through MSRC may qualify for the Microsoft .NET Bounty. Details of the Microsoft .NET Bounty Program including terms and conditions are at https://aka.ms/corebounty.

### Support

You can ask questions about this issue on GitHub in the .NET GitHub organization. The main repos are located at https://github.com/dotnet/runtime. The Announcements repo (https://github.com/dotnet/Announcements) will contain this bulletin as an issue and will include a link to a discussion issue. You can ask questions in the linked discussion issue.

### Disclaimer

The information provided in this advisory is provided "as is" without warranty of any kind. Microsoft disclaims all warranties, either express or implied, including the warranties of merchantability and fitness for a particular purpose. In no event shall Microsoft Corporation or its suppliers be liable for any damages whatsoever including direct, indirect, incidental, consequential, loss of business profits or special damages, even if Microsoft Corporation or its suppliers have been advised of the possibility of such damages. Some states do not allow the exclusion or limitation of liability for consequential or incidental damages so the foregoing limitation may not apply.

### External Links

[CVE-2026-114157](https://www.cve.org/CVERecord?id=CVE-2026-114157)

### Acknowledgements

- Antonio Alonso-Stepanov

### Revisions

V1.0 (November 10, 2026): Advisory published.

---

_Free to read, with fair use of about 60 pages a minute. For higher limits or API access: sales@infrastack.ai_