Malicious code in zwkopt5 (RubyGems)
Malicious code was discovered in the zwkopt5 RubyGems package. The package was identified and cataloged by the OpenSSF malicious packages project.
- Disclosed
- Last updated
- Blast radius
- All users of the zwkopt5 RubyGems package
- Ecosystems
- Attack vectors
- Affected entities
- zwkopt5RubyGems package
The zwkopt5 package on RubyGems was found to contain malicious code. This incident was identified and documented by the OpenSSF (Open Source Security Foundation) as part of their malicious packages tracking effort.\n\nThe package has been cataloged in the OpenSSF malicious packages repository with identifier MAL-2026-9887, indicating it was flagged as a confirmed malicious package.\n\nUsers who have installed this package should remove it immediately and audit their systems for any unauthorized activity or data exfiltration that may have occurred.
Indicators of compromise
- Packages
- zwkopt5
Remediation
- Remove the zwkopt5 package from all affected systems
- Audit systems for signs of compromise or unauthorized access
- Review application logs for suspicious activity
- Consider rotating credentials if the compromised system had access to sensitive data
- Update dependency management to exclude this package
Sources
- GitHub Advisory GHSA-6vf7-f2pp-6xw8 · GitHub Advisory Database
Cite this entry
"Malicious code in zwkopt5 (RubyGems)." supplychainattack.org, Supply Chain Attack Incident Catalog. Disclosed July 18, 2026; last updated July 18, 2026. https://supplychainattack.org/incident/malicious-code-in-zwkopt5-rubygems-x1hte7
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