OpenSSF/OSV advisory MAL-2026-4540 confirms this npm version as malicious. On require/import, index.js (lines 6-12) serializes the full process.env to /tmp/poc_impact.json and runs `whoami` and `ip addr` via execSync to fingerprint the host...
Source
OpenSSF Malicious Packages via OSV
Summary
Malicious code in crypt0co-walet-poc (npm)
Details
On require/import, index.js (lines 6-12) serializes the full process.env to /tmp/poc_impact.json and runs `whoami` and `ip addr` via execSync to fingerprint the host. Any consumer that imports this package leaks every environment variable available to the Node process — on CI and developer machines this routinely includes cloud credentials, npm/GitHub tokens, and other secrets — into a predictable, world-readable path in /tmp where any local user or subsequent process can read them. The package name `crypt0co-walet-poc` uses character substitutions (`0` for `o`, `walet` for `wallet`) consistent with impersonation of crypto-wallet packages, and the code self-labels as `CRITICAL IMPACT POC P0`. Author metadata fields (description, keywords, author) are empty. Even if the publisher's stated intent is bug-bounty research, the installer harm — full environment dump plus recon command execution at import time — is real and unconsented.
Decision reason
OpenSSF Malicious Packages via OSV confirms crypt0co-walet-poc@1.0.0 as malicious (MAL-2026-4540): Malicious code in crypt0co-walet-poc (npm)