Is CVE-2026-109481 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-109481 being exploited in the wild.

How severe is CVE-2026-109481?

High severity, with a CVSS score of 7.5, published 10 November 2026.

Which products and versions are affected?

Microsoft.AspNetCore.App.Runtime.linux-arm (NuGet) >= 11.0.0-preview.6.26359.118, = 11.0.0-preview.6.26359.118, = 11.0.0-preview.6.26359.118, = 11.0.0-preview.6.26359.118, <= 11.0.0-rc.3.26522.148, ECOSYSTEM:introduced=11.0.0-preview.6.26359.118,fixed=11.0.0; and 7 more.

Is there a fix for CVE-2026-109481?

Yes. Microsoft.AspNetCore.App.Runtime.linux-arm (NuGet): upgrade to 11.0.0 or later; Microsoft.AspNetCore.App.Runtime.linux-arm64 (NuGet): upgrade to 11.0.0 or later; Microsoft.AspNetCore.App.Runtime.linux-musl-arm (NuGet): upgrade to 11.0.0 or later; Microsoft.AspNetCore.App.Runtime.linux-musl-arm64 (NuGet): upgrade to 11.0.0 or later; Microsoft.AspNetCore.App.Runtime.linux-musl-x64 (NuGet): upgrade to 11.0.0 or later; Microsoft.AspNetCore.App.Runtime.linux-x64 (NuGet): upgrade to 11.0.0 or later; Microsoft.AspNetCore.App.Runtime.osx-arm64 (NuGet): upgrade to 11.0.0 or later; Microsoft.AspNetCore.App.Runtime.osx-x64 (NuGet): upgrade to 11.0.0 or later; Microsoft.AspNetCore.App.Runtime.win-arm64 (NuGet): upgrade to 11.0.0 or later; Microsoft.AspNetCore.App.Runtime.win-x64 (NuGet): upgrade to 11.0.0 or later; Microsoft.AspNetCore.App.Runtime.win-x86 (NuGet): upgrade to 11.0.0 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

How is CVE-2026-109481 attacked?

It is attacked over the network.

Am I affected by CVE-2026-109481?

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.

CVE-2026-109481: Microsoft ASP.NET Core cross-site request forgery privilege escalation

Q: Is there a fix for CVE-2026-109481?

Yes. Microsoft.AspNetCore.App.Runtime.linux-arm (NuGet): upgrade to 11.0.0 or later; Microsoft.AspNetCore.App.Runtime.linux-arm64 (NuGet): upgrade to 11.0.0 or later; Microsoft.AspNetCore.App.Runtime.linux-musl-arm (NuGet): upgrade to 11.0.0 or later; Microsoft.AspNetCore.App.Runtime.linux-musl-arm64 (NuGet): upgrade to 11.0.0 or later; Microsoft.AspNetCore.App.Runtime.linux-musl-x64 (NuGet): upgrade to 11.0.0 or later; Microsoft.AspNetCore.App.Runtime.linux-x64 (NuGet): upgrade to 11.0.0 or later; Microsoft.AspNetCore.App.Runtime.osx-arm64 (NuGet): upgrade to 11.0.0 or later; Microsoft.AspNetCore.App.Runtime.osx-x64 (NuGet): upgrade to 11.0.0 or later; Microsoft.AspNetCore.App.Runtime.win-arm64 (NuGet): upgrade to 11.0.0 or later; Microsoft.AspNetCore.App.Runtime.win-x64 (NuGet): upgrade to 11.0.0 or later; Microsoft.AspNetCore.App.Runtime.win-x86 (NuGet): upgrade to 11.0.0 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

Q: How is CVE-2026-109481 attacked?

It is attacked over the network.

Q: Am I affected by CVE-2026-109481?

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.

CVE-2026-109481 · Severity: high · CVSS 7.5 · Published 2026-11-10

ASP.NET Core is a framework for building web applications. A cross-site request forgery (CSRF) vulnerability allows an attacker to trick authenticated users into performing unwanted actions, potentially leading to privilege escalation. An attacker could gain elevated access to sensitive application functionality without proper authorization.

Quick answers

Is CVE-2026-109481 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-109481 being exploited in the wild.
How severe is CVE-2026-109481?: High severity, with a CVSS score of 7.5, published 10 November 2026.
Which products and versions are affected?: Microsoft.AspNetCore.App.Runtime.linux-arm (NuGet) >= 11.0.0-preview.6.26359.118, <= 11.0.0-rc.3.26522.148, ECOSYSTEM:introduced=11.0.0-preview.6.26359.118,fixed=11.0.0; Microsoft.AspNetCore.App.Runtime.linux-arm64 (NuGet) >= 11.0.0-preview.6.26359.118, <= 11.0.0-rc.3.26522.148, ECOSYSTEM:introduced=11.0.0-preview.6.26359.118,fixed=11.0.0; Microsoft.AspNetCore.App.Runtime.linux-musl-arm (NuGet) >= 11.0.0-preview.6.26359.118, <= 11.0.0-rc.3.26522.148, ECOSYSTEM:introduced=11.0.0-preview.6.26359.118,fixed=11.0.0; Microsoft.AspNetCore.App.Runtime.linux-musl-arm64 (NuGet) >= 11.0.0-preview.6.26359.118, <= 11.0.0-rc.3.26522.148, ECOSYSTEM:introduced=11.0.0-preview.6.26359.118,fixed=11.0.0; and 7 more.
Is there a fix for CVE-2026-109481?: Yes. Microsoft.AspNetCore.App.Runtime.linux-arm (NuGet): upgrade to 11.0.0 or later; Microsoft.AspNetCore.App.Runtime.linux-arm64 (NuGet): upgrade to 11.0.0 or later; Microsoft.AspNetCore.App.Runtime.linux-musl-arm (NuGet): upgrade to 11.0.0 or later; Microsoft.AspNetCore.App.Runtime.linux-musl-arm64 (NuGet): upgrade to 11.0.0 or later; Microsoft.AspNetCore.App.Runtime.linux-musl-x64 (NuGet): upgrade to 11.0.0 or later; Microsoft.AspNetCore.App.Runtime.linux-x64 (NuGet): upgrade to 11.0.0 or later; Microsoft.AspNetCore.App.Runtime.osx-arm64 (NuGet): upgrade to 11.0.0 or later; Microsoft.AspNetCore.App.Runtime.osx-x64 (NuGet): upgrade to 11.0.0 or later; Microsoft.AspNetCore.App.Runtime.win-arm64 (NuGet): upgrade to 11.0.0 or later; Microsoft.AspNetCore.App.Runtime.win-x64 (NuGet): upgrade to 11.0.0 or later; Microsoft.AspNetCore.App.Runtime.win-x86 (NuGet): upgrade to 11.0.0 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
How is CVE-2026-109481 attacked?: It is attacked over the network.
Am I affected by CVE-2026-109481?: 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.

How to fix

Microsoft.AspNetCore.App.Runtime.linux-arm (NuGet): upgrade to 11.0.0 or later

dotnet add package Microsoft.AspNetCore.App.Runtime.linux-arm --version 11.0.0

Microsoft.AspNetCore.App.Runtime.linux-arm64 (NuGet): upgrade to 11.0.0 or later

dotnet add package Microsoft.AspNetCore.App.Runtime.linux-arm64 --version 11.0.0

Microsoft.AspNetCore.App.Runtime.linux-musl-arm (NuGet): upgrade to 11.0.0 or later

dotnet add package Microsoft.AspNetCore.App.Runtime.linux-musl-arm --version 11.0.0

Microsoft.AspNetCore.App.Runtime.linux-musl-arm64 (NuGet): upgrade to 11.0.0 or later

dotnet add package Microsoft.AspNetCore.App.Runtime.linux-musl-arm64 --version 11.0.0

Microsoft.AspNetCore.App.Runtime.linux-musl-x64 (NuGet): upgrade to 11.0.0 or later

dotnet add package Microsoft.AspNetCore.App.Runtime.linux-musl-x64 --version 11.0.0

Microsoft.AspNetCore.App.Runtime.linux-x64 (NuGet): upgrade to 11.0.0 or later

dotnet add package Microsoft.AspNetCore.App.Runtime.linux-x64 --version 11.0.0

Microsoft.AspNetCore.App.Runtime.osx-arm64 (NuGet): upgrade to 11.0.0 or later

dotnet add package Microsoft.AspNetCore.App.Runtime.osx-arm64 --version 11.0.0

Microsoft.AspNetCore.App.Runtime.osx-x64 (NuGet): upgrade to 11.0.0 or later

dotnet add package Microsoft.AspNetCore.App.Runtime.osx-x64 --version 11.0.0

Microsoft.AspNetCore.App.Runtime.win-arm64 (NuGet): upgrade to 11.0.0 or later

dotnet add package Microsoft.AspNetCore.App.Runtime.win-arm64 --version 11.0.0

Microsoft.AspNetCore.App.Runtime.win-x64 (NuGet): upgrade to 11.0.0 or later

dotnet add package Microsoft.AspNetCore.App.Runtime.win-x64 --version 11.0.0

Microsoft.AspNetCore.App.Runtime.win-x86 (NuGet): upgrade to 11.0.0 or later

dotnet add package Microsoft.AspNetCore.App.Runtime.win-x86 --version 11.0.0

Technical details

A CSRF vulnerability in ASP.NET Core permits an attacker to forge requests from authenticated users, bypassing anti-CSRF protections to escalate privileges. The attack requires network access and relies on social engineering or user interaction to trick a victim into visiting a malicious site. An attacker can exploit this to perform administrative actions or access restricted resources under the victim's user context.

Affected products

Microsoft ASP.NET Core

Identifiers

CVE-2026-109481
GHSA-xw2x-23jm-j582

Timeline

2026-11-10: disclosed

References

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-109481

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