Malicious code in seedefender (NuGet)
Malicious code was discovered in the seedefender NuGet package. The incident was identified and reported via the OpenSSF malicious packages database.
- Disclosed
- Last updated
- Blast radius
- Unknown; depends on seedefender adoption and which versions contained malicious code
- Ecosystems
- Attack vectors
- Affected entities
- seedefenderNuGet package
The seedefender NuGet package was found to contain malicious code. The vulnerability was identified and documented by the OpenSSF (Open Source Security Foundation) as part of their malicious packages tracking effort.\n\nThe incident was published on 2026-07-20 and assigned identifier MAL-2025-2923 in the OpenSSF malicious packages database. The source advisory is available on GitHub at GHSA-cm6q-chg6-p7gc.\n\nNo specific version numbers, payload details, or remediation timeline are provided in the available source material.
Indicators of compromise
- Packages
- seedefender
Remediation
- Remove or uninstall the seedefender NuGet package from affected systems
- Review any systems that may have installed seedefender for signs of compromise
- Check NuGet package manager logs for installation history
- Consult the OpenSSF malicious packages database for specific affected versions and details
Sources
- GitHub Advisory GHSA-cm6q-chg6-p7gc · GitHub Advisory Database
Cite this entry
"Malicious code in seedefender (NuGet)." supplychainattack.org, Supply Chain Attack Incident Catalog. Disclosed July 20, 2026; last updated July 20, 2026. https://supplychainattack.org/incident/malicious-code-in-seedefender-nuget-06ytp7
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