json-to-simple-graphql-schemanpm
Advisory published Updated
json-to-simple-graphql-schema is a confirmed malicious npm package (MAL-2026-4590) that steals credentials and exfiltrates sensitive data (malicious version 1.0.0). Do not install it — remove it immediately and rotate any exposed credentials.
Malicious code in json-to-simple-graphql-schema (npm)
What this malware does
The package contains a poc.js script that collects host reconnaissance data (os.hostname(), os.platform(), output of whoami via child_process) and POSTs it to a remote endpoint over https.request. The combination of os/system enumeration, child_process command execution (e.g. whoami), and an outbound HTTPS POST in the same file is the canonical host-reconnaissance and exfiltration shape. The package name suggests a JSON-to-GraphQL schema converter, and there is no legitimate reason for such a converter to ship a script that runs whoami, reads host identity, and ships the results off-host. Installing or executing this package gives the publisher tangible host reconnaissance data from the installer's machine.
Any computer that has this package installed or running should be considered fully compromised. All secrets and keys stored on that computer should be rotated immediately from a different computer. The package should be removed, but as full control of the computer may have been given to an outside entity, there is no guarantee that removing the package will remove all malicious software resulting from installing it.
Malicious versions
Indicators of compromise (SHA-256)
Detection & response playbook
Credential / info stealerFind it
Search your lockfiles and build artifacts for json-to-simple-graphql-schema (version 1.0.0).
If you installed it — respond
json-to-simple-graphql-schema is built to steal secrets, so assume every credential the build or runtime could read is compromised. Remove it from your project and lockfile, then rotate ALL exposed secrets — npm/registry tokens, cloud keys, CI/CD secrets, SSH keys, and any .env values — from a known-clean machine. Audit logs for unauthorized use of those credentials.
Did it already run?
If json-to-simple-graphql-schema was installed, its post-install payload may already have run. Removing the package does not undo that — check outbound connections and credential use from the install window onward.
Frequently asked questions
Campaign
References
Credits
- Amazon Inspector · finder
Detect & block this
O3 blocks json-to-simple-graphql-schema-class packages before install and in CI — and if it already ran, its runtime egress monitoring catches the credential exfiltration and severs the channel.