Contrast Security has launched CVE Shield, a runtime microsandbox that protects applications from known CVE exploits by blocking the capabilities an exploit needs to succeed — such as native code execution, remote class loading, and arbitrary file writes — rather than relying on payload signatures. The initial release covers 60 critical Java vulnerabilities including Log4Shell and Spring4Shell, with Go, Node.js, .NET, and Python support planned for late 2026. Deployment is automated via a single command and integrates with Kubernetes and OpenShift without code or Dockerfile changes. The motivation is AI-accelerated exploitation: models from Anthropic, OpenAI, and Microsoft have demonstrated working exploits of known vulnerabilities in under a day, threatening to dramatically increase the historically low 5% exploitation rate of known CVEs. Runtime protection is positioned as a way to close the gap between vulnerability discovery and patch deployment.
