{"record":{"id":"61bc419d8118f4e0","repo":"gofiber/fiber","slug":"csrf-failed-to-store-token-in-storage-w","errorCode":null,"errorMessage":"csrf: failed to store token in storage: %w","messagePattern":"csrf: failed to store token in storage: %w","errorType":"http","errorClass":null,"httpStatus":500,"severity":"error","filePath":"middleware/csrf/csrf.go","lineNumber":286,"sourceCode":"func getRawFromStorage(c fiber.Ctx, token string, cfg *Config, sessionManager *sessionManager, storageManager *storageManager) ([]byte, error) {\n\tif cfg.Session != nil {\n\t\treturn sessionManager.getRaw(c, token, dummyValue), nil\n\t}\n\traw, err := storageManager.getRaw(c, token)\n\tif err != nil {\n\t\treturn nil, fmt.Errorf(\"csrf: failed to fetch token from storage: %w\", err)\n\t}\n\treturn raw, nil\n}\n\n// createOrExtendTokenInStorage creates or extends the token in the storage\nfunc createOrExtendTokenInStorage(c fiber.Ctx, token string, cfg *Config, sessionManager *sessionManager, storageManager *storageManager) error {\n\tif cfg.Session != nil {\n\t\tsessionManager.setRaw(c, token, dummyValue, cfg.IdleTimeout)\n\t\treturn nil\n\t}\n\tif err := storageManager.setRaw(c, token, dummyValue, cfg.IdleTimeout); err != nil {\n\t\treturn fmt.Errorf(\"csrf: failed to store token in storage: %w\", err)\n\t}\n\treturn nil\n}\n\nfunc deleteTokenFromStorage(c fiber.Ctx, token string, cfg *Config, sessionManager *sessionManager, storageManager *storageManager) error {\n\tif cfg.Session != nil {\n\t\tsessionManager.delRaw(c)\n\t\treturn nil\n\t}\n\tif err := storageManager.delRaw(c, token); err != nil {\n\t\treturn fmt.Errorf(\"csrf: failed to delete token from storage: %w\", err)\n\t}\n\treturn nil\n}\n\n// Update CSRF cookie\n// if expireCookie is true, the cookie will expire immediately\nfunc updateCSRFCookie(c fiber.Ctx, cfg *Config, token string) {","sourceCodeStart":268,"sourceCodeEnd":304,"githubUrl":"https://github.com/gofiber/fiber/blob/a105acad6c1e4576a77f01e02973f67e962bb58d/middleware/csrf/csrf.go#L268-L304","documentation":"Returned by createOrExtendTokenInStorage when storageManager.setRaw fails while writing or refreshing a CSRF token. The token issued to the client could not be persisted, so subsequent validation of that token will fail.","triggerScenarios":"A new CSRF token is being created or an existing one refreshed (sliding IdleTimeout), and the Storage SetWithContext call errors. Happens on requests that mint/rotate tokens against a configured external Storage.","commonSituations":"Storage backend down or at capacity during token issuance; write timeout; quota exceeded; ACL missing SET permission; context cancellation; custom Storage impl returning an error on Set.","solutions":["Inspect the wrapped error to find the cause (capacity, network, permission).","Verify the Storage credentials have SET permission and the backend has capacity.","Confirm IdleTimeout and the backend's TTL support are compatible (the storage must honor expiration).","Decide fail policy: if token cannot be stored, the next request will fail CSRF — consider returning a clear error to the client rather than a silently-broken token."],"exampleFix":"// before: surfacing the raw storage error to the client\nif err := storageManager.setRaw(c, token, dummyValue, cfg.IdleTimeout); err != nil {\n    return fmt.Errorf(\"csrf: failed to store token in storage: %w\", err)\n}\n\n// after: log internally and return a clean 503 so the client retries\nif err := storageManager.setRaw(c, token, dummyValue, cfg.IdleTimeout); err != nil {\n    log.Error(\"csrf token store failed:\", err)\n    return c.Status(fiber.StatusServiceUnavailable).\n        SendString(\"CSRF storage unavailable; please retry\")\n}","handlingStrategy":"validation","validationCode":"func validateCsrfWrite(ctx context.Context, s fiber.Storage) error {\n    return s.SetWithContext(ctx, \"__csrf_probe__\", []byte(\"x\"), time.Second)\n}","typeGuard":null,"tryCatchPattern":"if err := storageManager.setRaw(c, token, dummyValue, cfg.IdleTimeout); err != nil {\n    log.Error(\"csrf token store failed:\", err)\n    return c.Status(fiber.StatusServiceUnavailable).\n        SendString(\"CSRF storage unavailable; retry\")\n}","preventionTips":["Ensure Storage credentials have SET permission and capacity headroom.","Confirm the backend honors the IdleTimeout TTL semantics.","Return a clear 503 to the client when the token cannot be stored."],"tags":["csrf","storage","auth","write","security","go","fiber"],"backgroundTag":null,"analyzedSha":"a105acad6c1e4576a77f01e02973f67e962bb58d","analyzedAt":"2026-08-11T17:33:26.942Z","contentChangedAt":null,"schemaVersion":2},"datasetVersion":"2026-09-23T08:17:48.524Z"}