Malware in player-theming
The npm package player-theming was found to contain malware, resulting in full system compromise of any computer with the package installed or running. GitHub Security Advisory GHSA-j229-wx6p-5j43 was published on 2026-06-29.
- Disclosed
- Last updated
- Blast radius
- Any system with the package installed or running
- Ecosystems
- Attack vectors
- Affected entities
- player-theming
The npm package player-theming was identified as containing malware. According to the GitHub Security Advisory, any computer that has this package installed or running should be considered fully compromised.\n\nImmediate remediation steps include rotating all secrets and keys stored on affected computers from a different, uncompromised system. While the package should be removed, there is no guarantee that removal will eliminate all malicious software that may have been installed as a result of the initial compromise, given that the attacker may have gained full control of the system.\n\nThe advisory was published on 2026-06-29 and assigned identifier GHSA-j229-wx6p-5j43.
Indicators of compromise
- Packages
- player-theming
Remediation
- Immediately rotate all secrets, keys, and credentials from a different, uncompromised computer
- Remove the player-theming package from all affected systems
- Conduct a full security audit and forensic analysis of any system that had the package installed
- Monitor affected systems for signs of persistent malware or unauthorized access
- Consider the affected systems as potentially fully compromised and plan for complete rebuild if critical infrastructure
Sources
- GitHub Advisory GHSA-j229-wx6p-5j43 · GitHub Advisory Database
Cite this entry
"Malware in player-theming." supplychainattack.org, Supply Chain Attack Incident Catalog. Disclosed June 29, 2026; last updated June 29, 2026. https://supplychainattack.org/incident/malware-in-player-theming-1ordh1
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