Malware in marked-prettier
Malware was discovered in the npm package marked-prettier. Systems with this package installed are considered fully compromised and require immediate remediation.
- Disclosed
- Last updated
- Blast radius
- Any system with marked-prettier installed or running
- Ecosystems
- Attack vectors
- Affected entities
- marked-prettier
The npm package marked-prettier 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 malware grants full control of affected systems to an outside entity. All secrets and cryptographic keys stored on compromised computers should be rotated immediately from a different, unaffected system.\n\nWhile the package should be removed, complete removal of all malicious software cannot be guaranteed due to the level of system compromise. A full security audit and potential system rebuild may be necessary for affected users."
Indicators of compromise
- Packages
- marked-prettier
Remediation
- Immediately remove the marked-prettier package from all systems
- Rotate all secrets, API keys, and cryptographic credentials from a different, unaffected computer
- Conduct a full security audit of any system that had marked-prettier installed
- Consider rebuilding affected systems from clean media if full compromise is suspected
- Review system logs and network traffic for signs of unauthorized access or data exfiltration
Sources
- GitHub Advisory GHSA-hwmr-cmgq-wr7x · GitHub Advisory Database
Cite this entry
"Malware in marked-prettier." supplychainattack.org, Supply Chain Attack Incident Catalog. Disclosed July 10, 2026; last updated July 10, 2026. https://supplychainattack.org/incident/malware-in-marked-prettier-rjvp1f
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