Malicious code in zztestno44 (RubyGems)
Malicious code was discovered in the zztestno44 RubyGems package. The package was identified and cataloged by the OpenSSF malicious packages project.
- Disclosed
- Last updated
- Blast radius
- Unknown; appears to be a test/demonstration package
- Ecosystems
- Attack vectors
- Affected entities
- zztestno44RubyGems package
The zztestno44 package on RubyGems was found to contain malicious code. The vulnerability was identified and credited to the OpenSSF's malicious packages tracking project, which maintains a public catalog of known malicious software supply chain incidents.\n\nThe package was assigned the identifier MAL-2026-9985 in the OpenSSF malicious packages database. The incident was disclosed on July 18, 2026, via a GitHub Security Advisory (GHSA-973q-jr2q-hvfp).\n\nGiven the naming convention ("zztestno44"), this may be a test or demonstration package used for security research or validation purposes, though the malicious code classification indicates it contained genuine malicious payload.
Indicators of compromise
- Packages
- zztestno44
Remediation
- Remove or uninstall the zztestno44 package from any systems where it was installed
- Review application dependencies to ensure zztestno44 is not required
- Check for any suspicious activity or artifacts left by the package on affected systems
- Update dependency management tools to block or flag this package
Sources
- GitHub Advisory GHSA-973q-jr2q-hvfp · GitHub Advisory Database
Cite this entry
"Malicious code in zztestno44 (RubyGems)." supplychainattack.org, Supply Chain Attack Incident Catalog. Disclosed July 18, 2026; last updated July 18, 2026. https://supplychainattack.org/incident/malicious-code-in-zztestno44-rubygems-70bu1g
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