Malware in prettier-plugin-base
Malware was discovered in the npm package prettier-plugin-base. Systems with this package installed are considered fully compromised and require immediate remediation.
- Disclosed
- Last updated
- Blast radius
- Any system with the package installed or running
- Ecosystems
- Attack vectors
- Affected entities
- prettier-plugin-base
The npm package prettier-plugin-base was found to contain malware. According to the GitHub advisory, any computer with this package installed or running should be considered fully compromised.\n\nThe advisory recommends that all secrets and keys stored on affected computers be rotated immediately 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 compromise.\n\nThis represents a critical supply chain attack through a compromised npm package with potential for widespread impact across development environments and systems using this package.
Indicators of compromise
- Packages
- prettier-plugin-base
Remediation
- Immediately remove the prettier-plugin-base package from all affected systems
- Rotate all secrets, API keys, and credentials stored on compromised systems from a different, uncompromised computer
- Conduct a full security audit of any system that had this package installed
- Review system logs and network activity for signs of unauthorized access or data exfiltration
- Consider the affected system(s) as potentially fully compromised and plan for complete rebuild if critical systems are involved
- Check for any other suspicious packages or modifications to the system
Sources
- GitHub Advisory GHSA-8mq9-26pc-p36f · GitHub Advisory Database
Cite this entry
"Malware in prettier-plugin-base." supplychainattack.org, Supply Chain Attack Incident Catalog. Disclosed July 13, 2026; last updated July 13, 2026. https://supplychainattack.org/incident/malware-in-prettier-plugin-base-1hvfww
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