Malware in vybscan-testbed-inert-postinstall
Malware was distributed via the npm package vybscan-testbed-inert-postinstall. Systems with this package installed are considered fully compromised and require immediate remediation.
- Disclosed
- Last updated
- Blast radius
- Any system with the package installed
- Ecosystems
- Attack vectors
- Affected entities
- vybscan-testbed-inert-postinstall
The npm package vybscan-testbed-inert-postinstall contained malware that provided full system compromise to attackers. Any computer with this package installed or running should be considered fully compromised.\n\nThe malicious package was identified and reported via GitHub Advisory GHSA-cwcf-rmgg-qg9w. The attack vector appears to be a compromised or malicious package published directly to the npm registry.\n\nImmediate action is required for any affected systems, including complete credential rotation and removal of the package. However, due to the nature of the compromise, there is no guarantee that package removal alone will eliminate all malicious artifacts.
Indicators of compromise
- Packages
- vybscan-testbed-inert-postinstall
Remediation
- Immediately remove the vybscan-testbed-inert-postinstall package from all affected systems
- Rotate all secrets, keys, and credentials from a clean, unaffected computer
- Perform a full security audit and malware scan of any system that had this package installed
- Review system logs and network traffic for signs of unauthorized access or data exfiltration
- Consider the affected system(s) as potentially fully compromised and plan for complete rebuild if critical systems are involved
Sources
- GitHub Advisory GHSA-cwcf-rmgg-qg9w · GitHub Advisory Database
Cite this entry
"Malware in vybscan-testbed-inert-postinstall." supplychainattack.org, Supply Chain Attack Incident Catalog. Disclosed July 20, 2026; last updated July 20, 2026. https://supplychainattack.org/incident/malware-in-vybscan-testbed-inert-postinstall-mjigqf
Suggest a correction
Found an error or have a newer source? Corrections to factual errors take priority over new entries.
Related incidents
- activecritical
Malware in iot-kfh-s3
The npm package iot-kfh-s3 contains malware that grants full control of affected systems to an outside entity. Any computer with this package installed or running should be considered fully compromised.
npmCompromised package - containedcritical
Malware in lambda-cloudwatch-cdk
Malware was discovered in the npm package lambda-cloudwatch-cdk. Any computer with this package installed or running should be considered fully compromised, requiring immediate rotation of all secrets and keys from a different system.
npmCompromised package - containedcritical
Malware in s3-lambda-dynamodb-cdk
Malware was discovered in the npm package s3-lambda-dynamodb-cdk. Any computer with this package installed or running should be considered fully compromised, requiring immediate rotation of all secrets and keys from a different system.
npmCompromised package - containedcritical
Malware in lwc-slds-lbc
Malware was discovered in the npm package lwc-slds-lbc, resulting in full system compromise for any computer with the package installed or running. The advisory recommends immediate removal of the package and rotation of all secrets and keys from a different computer.
npmCompromised package