Echo 5

Apply the Go 1.27 baseline first. These rules cover Echo 5's routing, middleware, concrete pooled context, binding, proxy trust, browser defenses, static files, resource limits, and server lifecycle, and were checked against 5.3.1.

Version and migration boundary

• Import github.com/labstack/echo/v5, record it in go.mod and go.sum, and move to the newest v5 release when one ships, since Echo's version policy delivers v5 fixes in new v5 releases; rerun your route, middleware, and authorization tests before switching. The module's Go 1.25.0 minimum is a compatibility floor, not an extension of Go's upstream security support.
• Migrate every handler and middleware to *echo.Context, replace v4 logging adapters with reviewed log/slog handlers, and use only v5-compatible middleware packages; do not retain parallel v4 request paths accidentally.
• Treat the v4-to-v5 router, response, error-handler, and middleware signature changes as a security migration and compare the complete route/middleware inventory and authorization decisions before switching traffic.
• Pin external JWT, session, authorization, and other integrations independently and verify v5 compatibility; importing Echo's core middleware package does not supply these external controls.

Route and middleware integrity

• Register a fixed route table before serving traffic and supply echo.NewRouter(echo.RouterConfig{AllowOverwritingRoute: false}) through echo.Config.Router; echo.New() otherwise permits route replacement. Also reject equivalent parameterized patterns and path-normalization collisions;