{"id":"71dc44d88c381fe0","repo":"gofiber/fiber","slug":"csrf-failed-to-get-value-from-storage-w","errorCode":null,"errorMessage":"csrf: failed to get value from storage: %w","messagePattern":"csrf: failed to get value from storage: %w","errorType":"http","errorClass":null,"httpStatus":null,"severity":"error","filePath":"middleware/csrf/storage_manager.go","lineNumber":40,"sourceCode":"\tstorageManager := &storageManager{\n\t\tshouldRedactKeys: shouldRedactKeys,\n\t}\n\tif storage != nil {\n\t\t// Use provided storage if provided\n\t\tstorageManager.storage = storage\n\t} else {\n\t\t// Fallback to memory storage\n\t\tstorageManager.memory = memory.New()\n\t}\n\treturn storageManager\n}\n\n// get raw data from storage or memory\nfunc (m *storageManager) getRaw(ctx context.Context, key string) ([]byte, error) {\n\tif m.storage != nil {\n\t\traw, err := m.storage.GetWithContext(ctx, key)\n\t\tif err != nil {\n\t\t\treturn nil, fmt.Errorf(\"csrf: failed to get value from storage: %w\", err)\n\t\t}\n\t\treturn raw, nil\n\t}\n\n\tif value := m.memory.Get(key); value != nil {\n\t\traw, ok := value.([]byte)\n\t\tif !ok {\n\t\t\treturn nil, fmt.Errorf(\"csrf: unexpected value type %T in storage\", value)\n\t\t}\n\t\treturn raw, nil\n\t}\n\n\treturn nil, nil\n}\n\n// set data to storage or memory\nfunc (m *storageManager) setRaw(ctx context.Context, key string, raw []byte, exp time.Duration) error {\n\tif m.storage != nil {","sourceCodeStart":22,"sourceCodeEnd":58,"githubUrl":"https://github.com/gofiber/fiber/blob/9a4c7e57fe0b080a04235d28a4b0d2b4b353d58c/middleware/csrf/storage_manager.go#L22-L58","documentation":"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.","triggerScenarios":"CSRF token validation lookup calls Storage.GetWithContext and the backend errors: Redis unreachable, MySQL query error, ctx cancelled, or auth expired.","commonSituations":"Session/CSRF store down between deploys; rotated credentials; client disconnect; network partition; storage driver timeout too low for the workload.","solutions":["Resolve the underlying backend issue identified in the wrapped driver error.","Health-check the storage endpoint at app startup to fail fast on misconfiguration.","Tune the storage driver read timeout and connection pool to absorb load spikes.","Switch to a more reliable storage backend or run with cfg.Session to reuse the session store.","Wrap cfg.ErrorHandler to log and return a clear 5xx instead of leaking internals."],"exampleFix":"// before: no boot validation of csrf storage\nstore := redis.New()\napp.Use(csrf.New(csrf.Config{ Storage: store }))\n\n// after: validate + tune\nstore := redis.New(redis.Config{\n    URL:         os.Getenv(\"CSRF_REDIS_URL\"),\n    ReadTimeout: 500 * time.Millisecond,\n})\nctx, cancel := context.WithTimeout(context.Background(), 2*time.Second)\ndefer cancel()\nif _, err := store.GetWithContext(ctx, \"__probe__\"); err != nil {\n    log.Fatalf(\"csrf storage unhealthy: %v\", err)\n}","handlingStrategy":"try-catch","validationCode":"// Boot-time connectivity probe for the CSRF storage backend.\nctx, cancel := context.WithTimeout(context.Background(), 2*time.Second)\ndefer cancel()\nif _, err := store.GetWithContext(ctx, \"__csrf_probe__\"); err != nil {\n    log.Fatalf(\"csrf storage GET unhealthy: %v\", err)\n}","typeGuard":null,"tryCatchPattern":"raw, err := m.storage.GetWithContext(ctx, key)\nif err != nil {\n    if errors.Is(err, context.Canceled) || errors.Is(err, context.DeadlineExceeded) {\n        return nil, err // client gave up; let the caller treat as no token\n    }\n    return nil, fmt.Errorf(\"csrf: failed to get value from storage: %w\", err)\n}","preventionTips":["Health-check storage at startup.","Tune the storage read timeout for your latency budget.","Monitor GET error rate; alert before clients see auth failures.","Prefer cfg.Session when a resilient session store is already deployed."],"tags":["csrf","storage","network","security","fiber"],"analyzedSha":"9a4c7e57fe0b080a04235d28a4b0d2b4b353d58c","analyzedAt":"2026-08-04T21:44:03.395Z","schemaVersion":2}