#25392 build(deps): bump github.com/labstack/echo/v4 from 4.15.3 to 4.16.1 in /samples/server/petstore/go-echo-server

Sourced from github.com/labstack/echo/v4's releases.

v4.16.1

Security fixes

Upgrade with go get github.com/labstack/echo/v4@v4.16.1.

Go 1.26 or later is now required to use patched golang.org/x/ dependencies. Build deployments with a supported, patched Go toolchain.

• Validate upstream WebSocket upgrade responses through Go's HTTP reverse proxy. Rejected upgrades no longer leave a raw tunnel that bypasses Echo routing and route middleware. GHSA-cxf3-9h37-7rr8
• Close both WebSocket connections when either side disconnects, including when an upstream ignores client EOF. GHSA-9969-6676-49h5
• Bound BodyDump request and response captures to 5 MiB each by default while preserving complete payload delivery and request read errors. GHSA-f48p-c9v4-h7xv
• Bound decompressed request bodies to 100 MiB by default. Overflow returns HTTP 413, including through JSON and XML binding; exactly-at-limit bodies remain valid. GHSA-h7wr-284f-5qvc
• Upgrade golang.org/x/net to v0.60.0 and related dependencies, addressing GO-2026-6617, GO-2026-6612, GO-2026-6611, GO-2026-6610 and GO-2026-6603.
• Include the BodyLimit overflow-check correction and static-path hardening already merged since v4.16.0.

Behavior to review when upgrading

BodyDumpConfig.MaxRequestBytes and MaxResponseBytes control capture limits. Zero selects the 5 MiB default; -1 disables a limit. These limits affect captured logging data only: handlers and clients still receive complete bodies.

DecompressConfig.MaxDecompressedSize controls the decompressed-body limit. Zero selects the 100 MiB default; -1 disables it. Apply any smaller application body limit after decompression, and handle request-body read errors.

The proxy removes incoming Forwarded headers as defensive hardening. Backends relying on that header should use forwarding headers generated from the configured trusted IP extractor and scheme. WebSocket requests now honor the configured proxy transport, response modifier, target path and query in the same way as HTTP requests; ws and wss targets remain supported.

Other changes

This release includes router fixes for escaped colons, inline verbs and parameter storage, binding support for OpenAPI date formats, and documentation updates. Benchmark comparisons now run only for pull requests with shorter samples.

Thanks to @​Duodum, @​irisitymichaelgrundberg, @​q490107865, @​Hama1cco, @​jakezwang and @​Shubham-Padkonde for reports and contributions, and to the contributors credited in the individual commits.

Validation: upstream lint checks and race tests passed on Linux, macOS and Windows with Go 1.26 and 1.27. Local tests on patched toolchains, vet, staticcheck and govulncheck also passed; govulncheck reported no reachable vulnerabilities. The module graph still contains an advisory for the unused, unmaintained golang.org/x/crypto/openpgp package (GO-2026-5932), which Echo does not import and for which no fixed dependency version is available.

Full changelog: https://github.com/labstack/echo/compare/v4.16.0...v4.16.1

v4.16.0

Security

This release fixes several security issues. Upgrading is recommended. Some fixes change behavior; read "Behavior changes to check before upgrading" below.

• Request scheme: Context.Scheme() now uses the X-Forwarded-Proto, X-Forwarded-Protocol, X-Forwarded-Ssl and X-Url-Scheme headers only when the request comes directly from a loopback, link-local or private network address or a unix socket. Before this, any client could send X-Forwarded-Proto: https over plain HTTP and skip HTTPSRedirect. When X-Forwarded-Proto is present, only it is used (its last value), and the scheme is returned in lowercase. the new Echo#SchemeExtractor field selects the strategy: ExtractSchemeFromHeaders(...TrustOption) (default), ExtractSchemeDirect() or LegacySchemeExtractor(). The Secure middleware now sets HSTS based on Context.Scheme(). The Proxy middleware always sets X-Forwarded-Proto from Context.Scheme() and removes X-Forwarded-Ssl, X-Forwarded-Protocol and X-Url-Scheme before forwarding. GHSA-2ffq-g2xg-c22p
• JSONP: Context.JSONP and Context.JSONPBlob accept only a callback that is empty, a JavaScript identifier or a dot-separated path of identifiers (ASCII letters, digits, _ and $). Any other callback returns a 400 Bad Request error that wraps the new ErrInvalidJSONPCallback, and nothing is written. JSONP responses now carry X-Content-Type-Options: nosniff. JSONP lets any website read the response with the user's cookies, so do not use it for data that needs authentication. GHSA-h9g5-28mm-hx3g
• MethodOverride: a POST can no longer be overridden to GET, HEAD, OPTIONS, TRACE or CONNECT. Before this, with the MethodFromForm or MethodFromQuery getter and MethodOverride registered with Use before the CSRF middleware, _method=GET skipped the CSRF check. Register MethodOverride with Echo#Pre. GHSA-r7w9-592q-9vg4
• Redirects: the trailing slash middlewares and the static directory redirect percent-encode control characters in the redirect path. Before this, /%09/evil.example/ redirected browsers to evil.example. GHSA-v753-g4cw-jm48
• Static files: with the default settings, the Static middleware resolves files from the same form of the path that the router matched, so /admin%2Fsecret.txt or /%61dmin/secret.txt can no longer reach a file under a guarded /admin/* route. GHSA-375p-5qhx-8wq4 The Static middleware and StaticDirectoryHandler (used by Echo.Static, Echo.StaticFS, Group.Static and Group.StaticFS) no longer serve paths with a ., .. or empty segment, such as /assets/../admin/secret.txt, also after path unescaping. GHSA-3pmx-cf9f-34xr
• Dependencies: update golang.org/x/text to v0.40.0 (GO-2026-5970).

Client IP address (no code change in v4)

Without Echo#IPExtractor, Context.RealIP() in v4 trusts the X-Forwarded-For and X-Real-IP headers from any client, so the rate limiter can be bypassed and the Proxy middleware forwards a spoofed X-Real-IP (GHSA-246p-cpwv-v3jq, GHSA-99jh-6h7p-pp36). Changing this default in v4 would put all clients behind a proxy into one rate-limit bucket, so v4 keeps it. Set an extractor that matches your deployment:

e.IPExtractor = echo.ExtractIPDirect()        // no proxy in front of the app
e.IPExtractor = echo.ExtractIPFromXFFHeader() // behind proxies in private networks that set X-Forwarded-For
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• 600b985 chore: prepare v4.16.1 security release (#3186)
• 3fb0ba7 Merge commit from fork
• be08005 fix(router): grow param values for contexts created before a route with more ...
• 320fe67 fix(bind): honor OpenAPI date, date-time and date-time-local format tags (v4)...
• f085ffb fix(router): handle escaped colons and inline verbs in v4 (#3132)
• 5440f99 fix(middleware): prevent BodyLimit bypass in v4 (#3131)
• 577ba39 static: harden dot-segment check for backslashes, test non-validating custom ...
• 5730445 docs: add Blacksmith to sponsors (#3127)
• a7109fa docs: link the OpenTelemetry middleware at labstack/echo-otel (#3125)
• e75c6c6 Merge pull request #3120 from labstack/chore/v4-bump-x-text
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