Socket

Socket is a supply chain security tool that goes beyond CVE databases to detect malicious and high-risk behaviors in open-source packages before they are installed. It analyzes actual package behavior (network calls, file system access, environment variable reads) and flags packages that exhibit suspicious patterns. Developers and security teams use Socket as a GitHub app or CLI tool to review every dependency PR, getting instant alerts when a package starts making unexpected network requests or installs a postinstall script. It catches the class of attacks that CVE databases miss because the attack is in new, unreviewed code. Socket's proactive approach addresses the growing threat of software supply chain attacks, where attackers compromise or publish malicious packages. Its analysis of 1M+ packages has caught dozens of real supply chain attacks before wider discovery.