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11 articles
Editor's pickLearn how to validate user-supplied URLs safely with scheme and host policies, DNS/IP checks, redirect controls, and network egress defenses for fetch features.
Learn how to validate URLs to prevent SSRF with scheme and host policies, DNS and IP checks, connection pinning, redirect validation, and egress controls.
Learn how to accept callback URLs safely with scheme and host allowlists, DNS/IP checks, redirect controls, and network egress restrictions for SSRF defense.
Learn how SSRF happens, why DNS and redirects complicate URL checks, and how allowlists, egress controls, and metadata protections reduce risk.
Learn how SSRF vulnerabilities arise in URL-fetching features, why DNS and redirects complicate validation, and how to reduce risk with layered controls.
Build a safer Node.js URL fetcher with HTTPS and host allowlists, redirect checks, timeouts, response limits, DNS safeguards, and egress controls.