Malicious code in zztest4098 (RubyGems)
Malicious code was discovered in the zztest4098 RubyGems package. The package was identified and cataloged by the OpenSSF malicious packages project.
- Disclosed
- Last updated
- Blast radius
- Low (test package with limited adoption)
- Ecosystems
- Attack vectors
- Affected entities
- zztest4098
The RubyGems package zztest4098 was found to contain malicious code. The discovery was credited to the OpenSSF (Open Source Security Foundation) and documented in their malicious packages repository.\n\nThis incident was tracked under the identifier MAL-2026-9983 and published as GitHub Advisory GHSA-x6f2-ghhj-6qpc on July 18, 2026.\n\nThe package appears to be a test package based on its naming convention, which likely limited its real-world impact and adoption.
Indicators of compromise
- Packages
- zztest4098
Remediation
- Remove zztest4098 from any Ruby projects that may have installed it
- Audit project dependencies to ensure no malicious packages are present
- Review RubyGems security advisories regularly for similar incidents
Sources
- GitHub Advisory GHSA-x6f2-ghhj-6qpc · GitHub Advisory Database
Cite this entry
"Malicious code in zztest4098 (RubyGems)." supplychainattack.org, Supply Chain Attack Incident Catalog. Disclosed July 18, 2026; last updated July 18, 2026. https://supplychainattack.org/incident/malicious-code-in-zztest4098-rubygems-1w2y7v
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