Fiber Release Notes

🚀 New

• Harden proxy middleware (#4405) New proxy.SecurityPolicy with secure defaults: private/loopback upstreams, non-http(s) schemes and HTTPS-to-HTTP redirect downgrades are rejected and hop-by-hop headers stripped.

  proxy.WithSecurityPolicy(proxy.SecurityPolicy{
      AllowPrivateIPs: true, // internal upstreams are blocked by default
  })
  

  https://docs.gofiber.io/middleware/proxy#security
• Add support for custom binding precedence (#4544) New binding_source struct tag overrides the Bind().All() source order per struct; the resolved order is cached per reflect.Type.

  type SearchReq struct {
      Name string `binding_source:"query,header,cookie,body,uri" query:"name" header:"x-name" json:"name"`
  }
  

  https://docs.gofiber.io/api/bind#custom-precedence
• Add SkipUnmatchedRoutes with two-tier 404/405 fast path (#4486) New fiber.Config option that answers unregistered paths with 404/405 before the middleware chain runs (CORS preflight exempt, off by default).

  app := fiber.New(fiber.Config{
      SkipUnmatchedRoutes: true, // default: false
  })
  

  https://docs.gofiber.io/api/fiber#skipunmatchedroutes

🧹 Updates

• Speed up route matching with a flat tree index, leading-byte candidate rejection and a specialized /const/:param matcher (#4558)
• Quick-reject routes on precomputed slash-count bounds (#4517)
• Restore Route inlining lost in the RFC 9110 changes (#4501) …