GCVE-110-OSM-2026-797

Advisory PublishedCVSS 9.6/10

Vulnetix · Advisory published March 27, 2026

Malicious Stardew Valley mod build tool package that exploits MSBuild integration to execute arbitrary .NET code. Targets Stardew Valley modding ecosystem with supply chain attack. Exploits NuGet's MSBuild integration by placing malicious code in .targets files as inline tasks. When projects build, MSBuild automatically imports and executes these tasks, downloading .NET executables from throwaway GitHub repositories with embedded obfuscated command-line payloads.

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Weaknesses (CWE)

CWE-506Embedded Malicious Code

Risk Scores

CVSS 3.1

9.6/10

Critical · CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H

Affected Products

Vendor	Product	Versions	Platforms
unknown	Pathoschild.Stardew.Mod.Build.Config	all (affected)	—

References

Malicious nuget package: Pathoschild.Stardew.Mod.Build.Config

advisory

vendor

Explore Further

Investigate this vulnerability in the interactive console or download the raw GCVE record.

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