VDB
GCVE-110-OSM-2026-248
GCVE-110-OSM-2026-248
Advisory PublishedCVSS 9.6/10
Malicious Tessa user interface library version 2. Supply chain attack targeting UI-based Tessa applications with MSBuild-based code execution.
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.
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.BuildConfig | * (affected) | — |
| unknown | Stl.Fusion.Ext.Contracts.Net | * (affected), all (affected), all (affected), all (affected), all (affected), all (affected), all (affected), all (affected) | — |
| unknown | requests-ml-min | all (affected) | — |
| unknown | Nughettt.TestPO | all (affected), all (affected), all (affected), * (affected), all (affected), all (affected) | — |
| unknown | Tessa.UI2 | all (affected) | — |
Aliases
References
Malicious nuget package: Tessa.UI2
advisory
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