Malicious code in zzjinavcsfossil (RubyGems)
Malicious code was published in the zzjinavcsfossil package on RubyGems. The package was identified and cataloged by the OpenSSF malicious packages project.
- Disclosed
- Last updated
- Blast radius
- Unknown; depends on adoption of the malicious package versions
- Ecosystems
- Attack vectors
- Affected entities
- zzjinavcsfossilMalicious package on RubyGems
A malicious package named zzjinavcsfossil was published to the RubyGems package repository. The package contained malicious code and was identified as part of the OpenSSF's malicious packages tracking effort.\n\nThe incident was disclosed on July 18, 2026, and documented in GitHub Advisory GHSA-7v49-hjpc-v59g. The malicious package was cataloged under OSV identifier MAL-2026-9951.\n\nThis appears to be a typosquatting or direct malicious package publication attack targeting Ruby developers.
Indicators of compromise
- Packages
- zzjinavcsfossil
Remediation
- Remove zzjinavcsfossil from all Gemfiles and dependency lists
- Audit any systems that may have installed this package for signs of compromise
- Review application logs for any suspicious activity from the time the package was installed
- Update to a clean state and verify no malicious code remains in the application environment
Sources
- GitHub Advisory GHSA-7v49-hjpc-v59g · GitHub Advisory Database
Cite this entry
"Malicious code in zzjinavcsfossil (RubyGems)." supplychainattack.org, Supply Chain Attack Incident Catalog. Disclosed July 18, 2026; last updated July 18, 2026. https://supplychainattack.org/incident/malicious-code-in-zzjinavcsfossil-rubygems-1l39et
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