OpenSSF/OSV advisory MAL-2026-13989 confirms this npm version as malicious. package.json declares a postinstall script that runs `node -e` to invoke fs.writeFileSync, creating /tmp/PWN_R3REAL/FIRED on the installer's machine when the package is installed...
Source
OpenSSF Malicious Packages via OSV
Summary
Malicious code in @secauditb20y/sec-test-r3b (npm)
Details
package.json declares a postinstall script that runs `node -e` to invoke fs.writeFileSync, creating /tmp/PWN_R3REAL/FIRED on the installer's machine when the package is installed. The package's main module only exports the literal value 42 and ships no native build or legitimate reason for install-time execution; the postinstall exists solely to demonstrate arbitrary code execution on the installer host at `npm install` time. The behavior fires automatically on default install and writes to a path outside the package directory, matching the shape of a proof-of-execution beacon. The package name and description self-identify as an authorized security test, but self-labeling is not a mitigation and the code path is functionally identical to a dropper marker.
Decision reason
OpenSSF Malicious Packages via OSV confirms @secauditb20y/sec-test-r3b@1.0.0 as malicious (MAL-2026-13989): Malicious code in @secauditb20y/sec-test-r3b (npm)