Malicious code in @antstackio/express-graphql-proxy (npm)
The npm package @antstackio/express-graphql-proxy was compromised and contained malicious code as part of the Sha1-Hulud: The Second Coming NPM worm. The malware steals tokens and credentials, publishes them to GitHub, propagates to other packages owned by the user, and may destroy the user's home directory.
- Disclosed
- Last updated
- Blast radius
- All users who installed @antstackio/express-graphql-proxy; secondary blast radius to packages owned by compromised developers and GitHub repositories with affected workflows.
- Ecosystems
- Attack vectors
- Threat actor
- Affected entities
- @antstackio/express-graphql-proxy
The npm package @antstackio/express-graphql-proxy was found to contain malicious code, confirmed by both Amazon Inspector and Google Open Source Security scanning. The compromise was attributed to the Sha1-Hulud: The Second Coming NPM worm.\n\nThe malicious payload performs multiple destructive actions: it steals authentication tokens and credentials, exfiltrates them by publishing to GitHub, self-propagates to other npm packages owned by the compromised user, and establishes persistence through malicious GitHub Actions. The worm may also destroy the user's home directory.\n\nThe incident was identified and documented by the OpenSSF malicious-packages repository, indicating coordinated detection and disclosure across multiple security organizations.
Indicators of compromise
- Packages
- @antstackio/express-graphql-proxy
Remediation
- Immediately remove @antstackio/express-graphql-proxy from all projects and dependencies
- Rotate all authentication tokens, API keys, and credentials that may have been exposed
- Audit GitHub repositories and Actions for unauthorized modifications or persistence mechanisms
- Review npm account activity and revoke any suspicious sessions or tokens
- Scan systems that installed this package for signs of home directory destruction or data loss
- Check GitHub for any unauthorized commits or published credentials
- Update to a clean, verified version of any required GraphQL proxy functionality from a trusted source
Sources
- GitHub Advisory GHSA-5gw8-r2hf-px46 · GitHub Advisory Database
Cite this entry
"Malicious code in @antstackio/express-graphql-proxy (npm)." supplychainattack.org, Supply Chain Attack Incident Catalog. Disclosed July 26, 2026; last updated July 26, 2026. https://supplychainattack.org/incident/malicious-code-in-antstackio-express-graphql-proxy-npm-1u44rh
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