Malicious code in Stl.Fusion.Ext.Contracts.Net (NuGet)
Malicious code was discovered in the Stl.Fusion.Ext.Contracts.Net NuGet package. The incident was identified and documented by the OpenSSF malicious packages project.
- Disclosed
- Last updated
- Blast radius
- Stl.Fusion.Ext.Contracts.Net package consumers on NuGet
- Ecosystems
- Attack vectors
- Affected entities
- Stl.Fusion.Ext.Contracts.NetNuGet package
A malicious code injection was identified in the Stl.Fusion.Ext.Contracts.Net package distributed via NuGet. The package was flagged as containing malicious code and documented in the OpenSSF's malicious packages repository.\n\nThe incident was publicly disclosed on July 20, 2026, and credited to the OpenSSF malicious packages project. The affected package is Stl.Fusion.Ext.Contracts.Net on NuGet.\n\nThis represents a compromised package supply chain attack where malicious code was injected into a legitimate-appearing NuGet package, potentially affecting all consumers who installed the affected versions.
Indicators of compromise
- Packages
- Stl.Fusion.Ext.Contracts.Net
Remediation
- Remove or uninstall the Stl.Fusion.Ext.Contracts.Net package from affected projects
- Audit project dependencies for any suspicious behavior or unauthorized changes
- Review and rotate any credentials or secrets that may have been exposed
- Update to a clean version of the package if a patched version is available
- Monitor systems for any indicators of compromise from the malicious code
Sources
- GitHub Advisory GHSA-ffv6-q8wq-xf72 · GitHub Advisory Database
Cite this entry
"Malicious code in Stl.Fusion.Ext.Contracts.Net (NuGet)." supplychainattack.org, Supply Chain Attack Incident Catalog. Disclosed July 20, 2026; last updated July 20, 2026. https://supplychainattack.org/incident/malicious-code-in-stl-fusion-ext-contracts-net-nuget-4q27db
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