CVE-2026-114146: Microsoft ASP.NET Core incorrect authorization privilege escalation

CVE-2026-114146 · Severity: critical · CVSS 9 · Published 2026-11-10

ASP.NET Core is a widely-used framework for building web applications. An attacker who already has valid credentials can exploit an authorization flaw to gain elevated privileges and access resources or functionality they should not be permitted to use, compromising application security and data protection.

Technologies: Microsoft Asp.Net Core, Microsoft.AspNetCore.App.Runtime.linux-arm (NuGet), Microsoft.AspNetCore.App.Runtime.linux-arm64 (NuGet), Microsoft.AspNetCore.App.Runtime.linux-musl-arm (NuGet), Microsoft.AspNetCore.App.Runtime.linux-musl-arm64 (NuGet), Microsoft.AspNetCore.App.Runtime.linux-musl-x64 (NuGet), Microsoft.AspNetCore.App.Runtime.linux-x64 (NuGet), Microsoft.AspNetCore.App.Runtime.osx-arm64 (NuGet), Microsoft.AspNetCore.App.Runtime.osx-x64 (NuGet), Microsoft.AspNetCore.App.Runtime.win-arm64 (NuGet), Microsoft.AspNetCore.App.Runtime.win-x64 (NuGet), Microsoft.AspNetCore.App.Runtime.win-x86 (NuGet), Microsoft.AspNetCore.Http.Connections (NuGet). Vendors: Microsoft, NuGet.

Quick answers

Is CVE-2026-114146 exploited in the wild?
No. Junglewise Threat Intelligence has no report of CVE-2026-114146 being exploited in the wild.
How severe is CVE-2026-114146?
Critical severity, with a CVSS score of 9, published 10 November 2026.
Which products and versions are affected?
Microsoft.AspNetCore.App.Runtime.linux-arm (NuGet) >= 8.0.0-preview.1.23112.2, <= 8.0.33; Microsoft.AspNetCore.App.Runtime.linux-arm64 (NuGet) >= 8.0.0-preview.1.23112.2, <= 8.0.33; Microsoft.AspNetCore.App.Runtime.linux-musl-arm (NuGet) >= 8.0.0-preview.1.23112.2, <= 8.0.33; Microsoft.AspNetCore.App.Runtime.linux-musl-arm64 (NuGet) >= 8.0.0-preview.1.23112.2, <= 8.0.33; and 8 more.
Is there a fix for CVE-2026-114146?
No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
How is CVE-2026-114146 attacked?
It is attacked over the network.
Am I affected by CVE-2026-114146?
Check whether you run Microsoft Asp.Net Core, Microsoft.AspNetCore.App.Runtime.linux-arm (NuGet), Microsoft.AspNetCore.App.Runtime.linux-arm64 (NuGet) or one of the others listed at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

Technical details

The vulnerability is an incorrect authorization flaw in ASP.NET Core that permits privilege escalation over the network. An already-authenticated attacker can exploit this to bypass authorization checks and gain elevated privileges within the application. A fix is available from Microsoft.

Affected products

  • Microsoft ASP.NET Core

Identifiers

  • CVE-2026-114146
  • GHSA-67wp-ghc2-fw2g

Timeline

  • 2026-11-10: disclosed

References

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