Malicious code in zwkopt3 (RubyGems)
Malicious code was discovered in the zwkopt3 RubyGems package. The package was identified by the OpenSSF malicious packages project and assigned identifier MAL-2026-9885.
- Disclosed
- Last updated
- Blast radius
- All users of the zwkopt3 RubyGems package
- Ecosystems
- Attack vectors
- Affected entities
- zwkopt3RubyGems package
The zwkopt3 package on RubyGems was found to contain malicious code. The discovery was credited to the OpenSSF's malicious packages project, which maintains a catalog of confirmed malicious software supply chain incidents.\n\nThe malicious package was tracked under identifier MAL-2026-9885 in the OpenSSF's malicious packages repository. This incident was disclosed on July 18, 2026, via a GitHub Security Advisory.\n\nAny system that installed or used the zwkopt3 package may have been affected by the malicious code.
Indicators of compromise
- Packages
- zwkopt3
Remediation
- Remove the zwkopt3 package from all affected systems
- Audit systems that previously installed zwkopt3 for signs of compromise
- Update to a clean version if one is available, or use an alternative package
- Review application dependencies to ensure no other malicious packages are present
Sources
- GitHub Advisory GHSA-q93q-prr6-52mf · GitHub Advisory Database
Cite this entry
"Malicious code in zwkopt3 (RubyGems)." supplychainattack.org, Supply Chain Attack Incident Catalog. Disclosed July 18, 2026; last updated July 18, 2026. https://supplychainattack.org/incident/malicious-code-in-zwkopt3-rubygems-1c1xpl
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