Fix Security Misconfiguration in Go Fiber
Fiber's default configuration is built for speed, not stealth. By default, it leaks its identity via the 'Server' header and lacks basic security headers like HSTS, CSP, and X-Frame-Options. This makes your stack an easy target for automated scanners and fingerprinting. Hardening Go Fiber requires stripping identifying headers and explicitly mounting security middleware to prevent common attack vectors like XSS and Clickjacking.
The Vulnerable Pattern
package mainimport “github.com/gofiber/fiber/v2”
func main() { // DEFAULT: Leaks ‘Server: fiber’ header // NO: Security headers, CORS restrictions, or Panic recovery app := fiber.New()
app.Get("/user/:id", func(c *fiber.Ctx) error { return c.SendString("User data") }) app.Listen(":3000")
}
The Secure Implementation
The hardened configuration addresses three critical areas: 1. Information Disclosure: By setting ServerHeader to an empty string, we stop the framework from identifying itself to attackers. 2. Resilience: The 'recover' middleware catches panics, preventing the service from going down and leaking internal code paths via stack traces. 3. Browser-Side Defense: The 'helmet' middleware automatically injects essential security headers (X-Content-Type-Options, X-Frame-Options, etc.), while strict CORS settings ensure only authorized domains can interact with the API, mitigating Cross-Origin attacks.
package mainimport ( “github.com/gofiber/fiber/v2” “github.com/gofiber/fiber/v2/middleware/helmet” “github.com/gofiber/fiber/v2/middleware/recover” “github.com/gofiber/fiber/v2/middleware/cors” )
func main() { app := fiber.New(fiber.Config{ // 1. Disable Server Fingerprinting ServerHeader: "", // 2. Prevent sensitive stack traces in production ErrorHandler: func(ctx *fiber.Ctx, err error) error { return ctx.Status(500).SendString(“Internal Server Error”) }, })
// 3. Prevent process crashes and stack leaks app.Use(recover.New()) // 4. Set Security Headers (XSS protection, Clickjacking, HSTS) app.Use(helmet.New()) // 5. Strict CORS Policy app.Use(cors.New(cors.Config{ AllowOrigins: "https://app.trusted-domain.com", AllowHeaders: "Origin, Content-Type, Accept", })) app.Get("/user/:id", func(c *fiber.Ctx) error { return c.SendString("Hardened User Data") }) app.Listen(":3000")
}
Your Go Fiber API
might be exposed to Security Misconfiguration
74% of Go Fiber apps fail this check. Hackers use automated scanners to find this specific flaw. Check your codebase before they do.
Free Tier • No Credit Card • Instant Report
Verified by Ghost Labs Security Team
This content is continuously validated by our automated security engine and reviewed by our research team. Ghost Labs analyzes over 500+ vulnerability patterns across 40+ frameworks to provide up-to-date remediation strategies.