Malware in calvora
Malware was discovered in the npm package calvora, resulting in full system compromise of any computer with the package installed or running. All affected systems should be considered fully compromised and all secrets and keys rotated immediately from a different computer.
- Disclosed
- Last updated
- Blast radius
- Any system with calvora installed or running
- Ecosystems
- Attack vectors
- Affected entities
- calvora
A critical malware incident was identified in the npm package calvora. According to the GitHub Security Advisory (GHSA-jwm3-4ffq-hr73), 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 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 there is no guarantee that removing the package will remove all malicious software resulting from the installation.\n\nThis represents a critical supply chain attack through a compromised npm package with severe implications for system integrity and security.
Indicators of compromise
- Packages
- calvora
Remediation
- Immediately isolate any computer with calvora installed from the network
- Rotate all secrets, keys, and credentials from a different, uncompromised computer
- Remove the calvora package from all affected systems
- Perform a full forensic analysis and malware scan on affected systems
- Review all access logs and audit trails for suspicious activity during the period the package was installed
- Consider full system rebuild if the package was installed on production or sensitive systems
Sources
- GitHub Advisory GHSA-jwm3-4ffq-hr73 · GitHub Advisory Database
Cite this entry
"Malware in calvora." supplychainattack.org, Supply Chain Attack Incident Catalog. Disclosed July 22, 2026; last updated July 22, 2026. https://supplychainattack.org/incident/malware-in-calvora-h8cdsz
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