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containedcritical

Malware in datefmt-helper

Malware was discovered in the npm package datefmt-helper. Systems with this package installed are considered fully compromised and require immediate remediation.

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Disclosed
Last updated
Blast radius
Any system with datefmt-helper installed or running
Ecosystems
npm
Attack vectors
Compromised package
Affected entities
  • datefmt-helper

The npm package datefmt-helper was found to contain malware. According to the GitHub advisory (GHSA-ch48-496p-pfv8), 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 complete system compromise."

Indicators of compromise

Packages
  • datefmt-helper

Remediation

  • Immediately isolate any system with datefmt-helper installed from the network
  • Rotate all secrets, API keys, and credentials from a different, uncompromised computer
  • Remove the datefmt-helper package from all affected systems
  • Perform a full security audit and malware scan of affected systems
  • Review system logs for any suspicious activity or unauthorized access
  • Consider full system rebuild if complete compromise is suspected

Sources

  1. GitHub Advisory GHSA-ch48-496p-pfv8 · GitHub Advisory Database

Cite this entry

"Malware in datefmt-helper." supplychainattack.org, Supply Chain Attack Incident Catalog. Disclosed July 15, 2026; last updated July 15, 2026. https://supplychainattack.org/incident/malware-in-datefmt-helper-7619nt

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