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Malicious code in rhynpm (npm)

The npm package rhynpm was found to contain malicious code. The package was identified by the OpenSSF malicious packages project and reported via GitHub Security Advisory GHSA-5jr8-4283-75xm.

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Disclosed
Last updated
Blast radius
All users of the rhynpm package on npm
Ecosystems
npm
Attack vectors
Compromised package
Affected entities
  • rhynpmnpm package

The npm package rhynpm was discovered to contain malicious code. The vulnerability was identified and credited to the OpenSSF's malicious packages project, which maintains a catalog of known malicious software supply chain incidents.\n\nThe advisory was published on GitHub as GHSA-5jr8-4283-75xm on July 15, 2026. Multiple versions of the rhynpm package were affected by this malicious code injection.\n\nUsers of the rhynpm package should immediately cease use and remove the package from their dependencies.

Indicators of compromise

Packages
  • rhynpm

Remediation

  • Remove the rhynpm package from all projects and dependencies
  • Audit any systems that may have executed code from rhynpm for signs of compromise
  • Review npm package.json and lock files to identify all affected installations
  • Consider using alternative packages that provide the same functionality from trusted sources
  • Monitor for any suspicious activity on systems where rhynpm was installed

Sources

  1. GitHub Advisory GHSA-5jr8-4283-75xm · GitHub Advisory Database

Cite this entry

"Malicious code in rhynpm (npm)." supplychainattack.org, Supply Chain Attack Incident Catalog. Disclosed July 15, 2026; last updated July 15, 2026. https://supplychainattack.org/incident/malicious-code-in-rhynpm-npm-szjrss

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