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OpenAdvisories
Malicious MAL-2026-6356

safe-json-38bd

npm package · versions 1.0.0

Reported Jun 23, 2026 · Updated Jun 23, 2026

If this package is installed

Remove it, treat the machine (or CI runner) as compromised, and rotate every secret, token and key it could access — from a different, clean machine.

Details

Source: amazon-inspector (523c83ae906ad871cb1ea3ffef4c0ae4e2d9f717376b86e97f6575e47cbc640d)
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.