Stack Trace Exposure (ARCH5127)

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Key go.security.stack-trace-exposure · Severity warning · Category security · CWE CWE-209

Returning raw error messages or stack traces to the client exposes internal implementation, file paths, and library versions to attackers.

Incorrect

func handler(w http.ResponseWriter, r *http.Request) {
  if err := process(r); err != nil {
    http.Error(w, err.Error()+"\n"+string(debug.Stack()), 500)
    return
  }
}

Correct

func handler(w http.ResponseWriter, r *http.Request) {
  if err := process(r); err != nil {
    log.Printf("process failed: %v", err)
    http.Error(w, "internal server error", 500)
    return
  }
}

Fix

Log error details server-side and return only a generic error message to the client.