The npm package 'vybscan-testbed-obfuscated-postinstall' version 1.0.0 contains a postinstall lifecycle script that executes obfuscated code decoded from a base64 string. Although the current decoded payload is inert (a console.log), the mechanism allows arbitrary code execution at install time by evaluating hidden code. This pattern is a known vector for install-time remote code execution and poses a security risk if the base64 payload is modified. No official patch or remediation guidance is provided.