safe-json-38bdnpm
Advisory published Updated
safe-json-38bd is a confirmed malicious npm package (MAL-2026-6356) 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 safe-json-38bd (npm)
What this malware does
package.json declares a postinstall hook ("postinstall": "node run.js") that executes run.js automatically on npm install. run.js imports os, fs, http, https, and child_process and gathers host identity and environment data: os.hostname(), os.userInfo(), os.platform(), process.env.USER, process.cwd(), plus filesystem reads via fs.readFileSync / fs.existsSync. The collected data is base64-encoded (Buffer.from(...).toString('base64')) and POSTed out via HTTP/HTTPS at multiple call sites in the same script. The package name has no documented purpose that would justify install-time host reconnaissance, base64 wrapping, or outbound POSTs. Combined fingerprints (lifecycle-hook auto-execute + host-identity collection + base64 encoding + outbound HTTP POST) match a credential / system-intel exfiltration dropper.
Malicious versions
Indicators of compromise (SHA-256)
Detection & response playbook
Credential / info stealerFind it
Search your lockfiles and build artifacts for safe-json-38bd (version 1.0.0).
If you installed it — respond
safe-json-38bd 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 safe-json-38bd 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 safe-json-38bd-class packages before install and in CI — and if it already ran, its runtime egress monitoring catches the credential exfiltration and severs the channel.