Malware in prettier_v1
Malware was discovered in the npm package prettier_v1. Any computer with this package installed or running should be considered fully compromised, requiring immediate rotation of all secrets and keys from a different system.
- Disclosed
- Last updated
- Blast radius
- Any system with prettier_v1 installed is considered fully compromised; all secrets and keys must be rotated from a different machine.
- Ecosystems
- Attack vectors
- Affected entities
- prettier_v1npm package
A critical malware incident was identified in the npm package prettier_v1. According to the GitHub Advisory (GHSA-q835-5j9v-22qg), any system that has installed or run this package should be treated as fully compromised.
The advisory recommends that all secrets and cryptographic keys stored on affected computers be rotated immediately from a different, uncompromised machine. While the package should be removed, the advisory notes that because full control of the computer may have been granted to an external entity, there is no guarantee that package removal will eliminate all malicious software that may have been installed as a result.
This represents a critical supply chain compromise affecting npm users who installed this package.
Indicators of compromise
- Packages
- prettier_v1
Remediation
- Immediately isolate any computer that has installed or run prettier_v1
- Rotate all secrets, API keys, and cryptographic credentials from a different, uncompromised computer
- Remove the prettier_v1 package from all affected systems
- Conduct a full security audit and malware scan of affected systems
- Review access logs and monitor for unauthorized activity on systems that had this package installed
- Consider the affected systems as potentially fully compromised and plan for reimaging if critical systems are involved
Sources
- GitHub Advisory GHSA-q835-5j9v-22qg · GitHub Advisory Database
Cite this entry
"Malware in prettier_v1." supplychainattack.org, Supply Chain Attack Incident Catalog. Disclosed June 15, 2026; last updated June 16, 2026. https://supplychainattack.org/incident/malware-in-prettier-v1-5lvtzo
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