Malicious code in Tessa.Net.V2 (NuGet)
Malicious code was discovered in the Tessa.Net.V2 NuGet package. The package was identified by the OpenSSF malicious packages project and reported via GitHub Security Advisory GHSA-hjvp-gm48-34mp.
- Disclosed
- Last updated
- Blast radius
- All consumers of the malicious Tessa.Net.V2 NuGet package versions
- Ecosystems
- Attack vectors
- Affected entities
- Tessa.Net.V2NuGet package containing malicious code
The Tessa.Net.V2 NuGet package was found to contain malicious code. This incident was identified and documented by the OpenSSF's malicious packages project, which maintains a catalog of known malicious software supply chain incidents.\n\nThe vulnerability was assigned GitHub Security Advisory identifier GHSA-hjvp-gm48-34mp and published on July 20, 2026. The malicious package was distributed through the NuGet package manager, potentially affecting all systems that installed the compromised versions.\n\nThe incident was tracked in the OpenSSF malicious packages repository under identifier MAL-2024-4680, indicating this was a confirmed malicious package incident discovered in 2024.
Indicators of compromise
- Packages
- Tessa.Net.V2
Remediation
- Remove or uninstall the Tessa.Net.V2 package from all affected systems
- Audit systems that installed Tessa.Net.V2 for signs of compromise or malicious activity
- Update to a clean, verified version of the package if a legitimate replacement is available
- Review NuGet package dependencies and implement package verification practices
- Monitor for any indicators of compromise from systems that may have executed the malicious code
Sources
- GitHub Advisory GHSA-hjvp-gm48-34mp · GitHub Advisory Database
Cite this entry
"Malicious code in Tessa.Net.V2 (NuGet)." supplychainattack.org, Supply Chain Attack Incident Catalog. Disclosed July 20, 2026; last updated July 20, 2026. https://supplychainattack.org/incident/malicious-code-in-tessa-net-v2-nuget-1jgx0j
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