Malware in @servicetitan/anvil-css-utilities
Malware was discovered in the npm package @servicetitan/anvil-css-utilities. 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
- @servicetitan/anvil-css-utilities
A malicious version of the npm package @servicetitan/anvil-css-utilities was published and made available to users. The package contained malware that grants full control of affected systems to an outside entity.\n\nAny computer that installed or ran this package should be considered fully compromised. The malware may have persisted beyond package removal, and all secrets and keys stored on affected systems should be rotated immediately from a different, uncompromised computer.\n\nThe incident was disclosed via GitHub Advisory GHSA-4vc6-772g-qrp6 on August 4, 2026.
Indicators of compromise
- Packages
- @servicetitan/anvil-css-utilities
Remediation
- Remove the @servicetitan/anvil-css-utilities package immediately
- Rotate all secrets, API keys, and credentials stored on affected systems from a different, uncompromised 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) potentially compromised and plan for full rebuild if critical infrastructure
Sources
- GitHub Advisory GHSA-4vc6-772g-qrp6 · GitHub Advisory Database
Cite this entry
"Malware in @servicetitan/anvil-css-utilities." supplychainattack.org, Supply Chain Attack Incident Catalog. Disclosed August 4, 2026; last updated August 4, 2026. https://supplychainattack.org/incident/malware-in-servicetitan-anvil-css-utilities-1wl6n9
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