Malware in polylabel-web-lib
Malware discovered in the npm package polylabel-web-lib. The package is reported to provide full system compromise to attackers. All affected systems should be considered fully compromised.
- Disclosed
- Last updated
- Blast radius
- Any system with the package installed or running
- Ecosystems
- Attack vectors
- Affected entities
- polylabel-web-lib
A critical malware incident has been identified in the npm package polylabel-web-lib. According to the GitHub Advisory (GHSA-4x59-mhxh-4ghc), any computer with this package installed or running should be considered fully compromised.\n\nThe advisory recommends immediate action: all secrets and keys stored on affected computers should be rotated 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 package installation, given the level of system access the malware appears to have obtained.\n\nAffected users should treat their systems as potentially fully compromised and take appropriate incident response measures.
Indicators of compromise
- Packages
- polylabel-web-lib
Remediation
- Immediately remove the polylabel-web-lib package from all affected systems
- Rotate all secrets, keys, and credentials from a different, uncompromised computer
- Assume full system compromise and conduct thorough forensic analysis
- Consider rebuilding affected systems from clean media
- Audit all system activity and network connections for signs of unauthorized access or data exfiltration
Sources
- GitHub Advisory GHSA-4x59-mhxh-4ghc · GitHub Advisory Database
Cite this entry
"Malware in polylabel-web-lib." supplychainattack.org, Supply Chain Attack Incident Catalog. Disclosed July 31, 2026; last updated August 1, 2026. https://supplychainattack.org/incident/malware-in-polylabel-web-lib-1maaqk
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