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Malicious code in zztargettest18587 (RubyGems)

Malicious code was discovered in the RubyGems package zztargettest18587. The package was identified and documented by the OpenSSF malicious packages project.

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Disclosed
Last updated
Blast radius
Low (appears to be a test/target package with limited real-world adoption)
Ecosystems
RubyGems
Attack vectors
Compromised package
Affected entities
  • zztargettest18587RubyGems package containing malicious code

A RubyGems package named zztargettest18587 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\nThe package was identified with the malicious package identifier MAL-2026-9975 and reported through GitHub's advisory system (GHSA-4wfw-gjrc-9qqv). The package name suggests it may be a test or target package used for security research or testing purposes.\n\nThe incident was published on July 18, 2026, and appears to have been contained through identification and advisory publication."

Indicators of compromise

Packages
  • zztargettest18587

Remediation

  • Remove zztargettest18587 from any Ruby projects or dependencies
  • Audit project dependencies for any versions of zztargettest18587 that may have been installed
  • Review GitHub Security Advisory GHSA-4wfw-gjrc-9qqv for specific details on the malicious behavior
  • Consult the OpenSSF malicious packages repository for technical indicators of compromise

Sources

  1. GitHub Advisory GHSA-4wfw-gjrc-9qqv · GitHub Advisory Database

Cite this entry

"Malicious code in zztargettest18587 (RubyGems)." supplychainattack.org, Supply Chain Attack Incident Catalog. Disclosed July 18, 2026; last updated July 18, 2026. https://supplychainattack.org/incident/malicious-code-in-zztargettest18587-rubygems-ygf21w

Suggest a correction

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