Malware in @zahlen/checkout
The npm package @zahlen/checkout contains malware that grants full system compromise to attackers. Any computer with this package installed or running should be considered fully compromised.
- Disclosed
- Last updated
- Blast radius
- Any system with the package installed or running
- Ecosystems
- Attack vectors
- Affected entities
- @zahlen/checkout
The npm package @zahlen/checkout has been identified as containing malware. According to the GitHub Advisory (GHSA-vj9r-9wwp-6cfp), any computer that has 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 initial compromise, given that the attacker may have gained full control of the system.\n\nUsers should treat any system that has run this package as potentially containing persistent malware and take appropriate incident response measures.
Indicators of compromise
- Packages
- @zahlen/checkout
Remediation
- Immediately isolate any computer that has installed or run @zahlen/checkout from the network
- Rotate all secrets, API keys, and credentials from a different, uncompromised computer
- Remove the @zahlen/checkout package from all systems
- Perform a full security audit and malware scan of affected systems
- Consider the affected system(s) as potentially compromised and plan for full rebuild/reimaging if critical systems are involved
- Review access logs and audit trails for any unauthorized activity during the period the package was installed
Sources
- GitHub Advisory GHSA-vj9r-9wwp-6cfp · GitHub Advisory Database
Cite this entry
"Malware in @zahlen/checkout." supplychainattack.org, Supply Chain Attack Incident Catalog. Disclosed August 6, 2026; last updated August 6, 2026. https://supplychainattack.org/incident/malware-in-zahlen-checkout-6vzfro
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