CVE-2025-26646: Microsoft.Build.Tasks.Core .NET Spoofing Vulnerability

CVE-2025-26646 · Severity: low · CVSS 3.1 · Published 2025-05-13

Microsoft.Build.Tasks.Core .NET Spoofing Vulnerability

Technologies: Microsoft.Build.Tasks.Core (NuGet). Vendors: NuGet.

Quick answers

Is CVE-2025-26646 exploited in the wild?
No. Junglewise Threat Intelligence has no report of CVE-2025-26646 being exploited in the wild.
How severe is CVE-2025-26646?
Low severity, with a CVSS score of 3.1, published 13 May 2025.
Which products and versions are affected?
Microsoft.Build.Tasks.Core (NuGet) ECOSYSTEM:introduced=15.8.166,fixed=15.9.30.
Is there a fix for CVE-2025-26646?
Yes. Microsoft.Build.Tasks.Core (NuGet): upgrade to 15.9.30 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
Am I affected by CVE-2025-26646?
Check whether you run Microsoft.Build.Tasks.Core (NuGet) 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.Build.Tasks.Core (NuGet): upgrade to 15.9.30 or later
    dotnet add package Microsoft.Build.Tasks.Core --version 15.9.30

Affected products

  • Microsoft.Build.Tasks.Core (NuGet) ECOSYSTEM:introduced=15.8.166,fixed=15.9.30

Identifiers

  • CVE-2025-26646
  • GHSA-h4j7-5rxr-p4wc

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