Malware in base62-86x
The npm package base62-86x contained malware that could fully compromise any system where it was installed or running. The advisory recommends treating affected systems as fully compromised and rotating all secrets and keys from a different computer.
- Disclosed
- Last updated
- Blast radius
- Any system with the package installed or running
- Ecosystems
- Attack vectors
- Affected entities
- base62-86x
The npm package base62-86x was found to contain malware. According to the GitHub Security Advisory (GHSA-239r-cp8p-5gfj), 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 immediately from a different, unaffected computer. While the package should be removed, the advisory notes that full control of the computer may have been given to an outside entity, meaning removal of the package alone may not eliminate all malicious software that resulted from the installation.\n\nThis represents a critical supply chain compromise affecting the npm ecosystem.
Indicators of compromise
- Packages
- base62-86x
Remediation
- Remove the base62-86x package immediately
- Rotate all secrets, API keys, and credentials from a different, unaffected computer
- Assume full system compromise and conduct forensic analysis
- Review system logs for unauthorized access or modifications
- Consider rebuilding affected systems from clean media if possible
- Audit any systems or services that may have been accessed using credentials stored on compromised machines
Sources
- GitHub Advisory GHSA-239r-cp8p-5gfj · GitHub Advisory Database
Cite this entry
"Malware in base62-86x." supplychainattack.org, Supply Chain Attack Incident Catalog. Disclosed July 10, 2026; last updated July 10, 2026. https://supplychainattack.org/incident/malware-in-base62-86x-n2sz82
Suggest a correction
Found an error or have a newer source? Corrections to factual errors take priority over new entries.
Related incidents
- containedcritical
Malware in motiondnb
Malware was discovered in the npm package motiondnb, resulting in full system compromise of any computer with the package installed or running. All secrets and keys on affected systems should be rotated immediately from a different computer.
npmCompromised package - containedcritical
Malware in ng-search-api
Malware was discovered in the npm package ng-search-api. Systems with this package installed are considered fully compromised and require immediate remediation.
npmCompromised package - containedcritical
Malware in firefly-utilities-helper
Malware was discovered in the npm package firefly-utilities-helper. Systems with this package installed are considered fully compromised and require immediate remediation.
npmCompromised package - containedcritical
Malware in polygon-gamma-apis
Malware was discovered in the npm package polygon-gamma-apis. Systems with this package installed or running should be considered fully compromised, with all secrets and keys requiring immediate rotation from a different computer.
npmCompromised package