gofiber/fiber · error

csrf: failed to get value from storage: %w

Error message

csrf: failed to get value from storage: %w

What it means

Thrown at middleware/csrf/storage_manager.go:40 by storageManager.getRaw when m.storage.GetWithContext returns a non-nil error. This is the inner layer wrapped by error 150 (csrf: failed to fetch token from storage). It surfaces the raw storage-driver error wrapped with the 'csrf: failed to get value from storage' prefix.

Source

Thrown at middleware/csrf/storage_manager.go:40

	storageManager := &storageManager{
		shouldRedactKeys: shouldRedactKeys,
	}
	if storage != nil {
		// Use provided storage if provided
		storageManager.storage = storage
	} else {
		// Fallback to memory storage
		storageManager.memory = memory.New()
	}
	return storageManager
}

// get raw data from storage or memory
func (m *storageManager) getRaw(ctx context.Context, key string) ([]byte, error) {
	if m.storage != nil {
		raw, err := m.storage.GetWithContext(ctx, key)
		if err != nil {
			return nil, fmt.Errorf("csrf: failed to get value from storage: %w", err)
		}
		return raw, nil
	}

	if value := m.memory.Get(key); value != nil {
		raw, ok := value.([]byte)
		if !ok {
			return nil, fmt.Errorf("csrf: unexpected value type %T in storage", value)
		}
		return raw, nil
	}

	return nil, nil
}

// set data to storage or memory
func (m *storageManager) setRaw(ctx context.Context, key string, raw []byte, exp time.Duration) error {
	if m.storage != nil {

View on GitHub (pinned to 9a4c7e57fe)

Solutions

1. Resolve the underlying backend issue identified in the wrapped driver error.
2. Health-check the storage endpoint at app startup to fail fast on misconfiguration.
3. Tune the storage driver read timeout and connection pool to absorb load spikes.
4. Switch to a more reliable storage backend or run with cfg.Session to reuse the session store.
5. Wrap cfg.ErrorHandler to log and return a clear 5xx instead of leaking internals.

Example fix

// before: no boot validation of csrf storage
store := redis.New()
app.Use(csrf.New(csrf.Config{ Storage: store }))

// after: validate + tune
store := redis.New(redis.Config{
    URL:         os.Getenv("CSRF_REDIS_URL"),
    ReadTimeout: 500 * time.Millisecond,
})
ctx, cancel := context.WithTimeout(context.Background(), 2*time.Second)
defer cancel()
if _, err := store.GetWithContext(ctx, "__probe__"); err != nil {
    log.Fatalf("csrf storage unhealthy: %v", err)
}

// Boot-time connectivity probe for the CSRF storage backend.
ctx, cancel := context.WithTimeout(context.Background(), 2*time.Second)
defer cancel()
if _, err := store.GetWithContext(ctx, "__csrf_probe__"); err != nil {
    log.Fatalf("csrf storage GET unhealthy: %v", err)
}

raw, err := m.storage.GetWithContext(ctx, key)
if err != nil {
    if errors.Is(err, context.Canceled) || errors.Is(err, context.DeadlineExceeded) {
        return nil, err // client gave up; let the caller treat as no token
    }
    return nil, fmt.Errorf("csrf: failed to get value from storage: %w", err)
}

When it happens

Trigger: CSRF token validation lookup calls Storage.GetWithContext and the backend errors: Redis unreachable, MySQL query error, ctx cancelled, or auth expired.

Common situations: Session/CSRF store down between deploys; rotated credentials; client disconnect; network partition; storage driver timeout too low for the workload.

Related errors

• csrf: failed to fetch token from storage: %w
• csrf: failed to store token in storage: %w
• csrf: failed to delete token from storage: %w
• csrf: failed to store key %q: %w
• csrf: failed to delete key %q: %w

AI-assisted analysis of gofiber/fiber@9a4c7e57fe (2026-08-04). Data as JSON: /data/errors/71dc44d88c381fe0.json. Report an issue: GitHub.