Malicious code in Stl.Fusion.Ext.Services.Net (NuGet)
Malicious code was discovered in the Stl.Fusion.Ext.Services.Net NuGet package. The incident was identified and documented by the OpenSSF malicious packages project.
- Disclosed
- Last updated
- Blast radius
- Stl.Fusion.Ext.Services.Net package consumers on NuGet
- Ecosystems
- Attack vectors
- Affected entities
- Stl.Fusion.Ext.Services.NetNuGet package
A malicious code injection was identified in the Stl.Fusion.Ext.Services.Net package distributed via NuGet. The package was flagged as containing malicious code and documented in the OpenSSF's malicious packages repository (MAL-2024-4658).\n\nThe incident was publicly disclosed on July 20, 2026, via GitHub Security Advisory GHSA-2f58-hxx8-x892. The OpenSSF maintains a curated list of known malicious packages to help the community identify and avoid compromised dependencies.\n\nAny systems that installed affected versions of this package should be considered potentially compromised and require investigation and remediation.
Indicators of compromise
- Packages
- Stl.Fusion.Ext.Services.Net
Remediation
- Remove or uninstall the Stl.Fusion.Ext.Services.Net package from all affected systems
- Audit systems that installed this package for signs of compromise or malicious activity
- Review package dependencies and replace with legitimate, verified alternatives
- Update to a clean version of the package if one becomes available, or migrate to an alternative library
- Monitor NuGet security advisories and the OpenSSF malicious packages list for similar incidents
Sources
- GitHub Advisory GHSA-2f58-hxx8-x892 · GitHub Advisory Database
Cite this entry
"Malicious code in Stl.Fusion.Ext.Services.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-services-net-nuget-1xowpa
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