Integrating EPSS and CVSS in Open Policy Agent To Quarantine Real-world Vulnerabilities

Learn how to integrate EPSS (Exploit Prediction Scoring System) and CVSS (Common Vulnerability Scoring System) within Open Policy Agent (OPA) to enhance vulnerability management and supply chain security. Explore the fundamental differences between CVSS, which assesses inherent vulnerability severity, and EPSS, which estimates the likelihood of real-world exploitation. Discover how Cloudsmith combines open source projects like EPSS and the Trivy scanner for CVSS analysis into OPA to strengthen supply chain enforcement. Examine four recent CVE case studies that demonstrate the contrast between these approaches, including vulnerabilities with high CVSS scores but low EPSS probability, and others with high EPSS scores indicating strong exploit potential that hadn't yet been published in the NIST CVE database during artifact scanning. Understand why leveraging both CVSS and EPSS creates a more comprehensive vulnerability management strategy, and learn practical implementation techniques for using open-source tools like OPA to enforce these security controls effectively within software supply chains.