CVE-2025-43855

tRPC allows users to build & consume fully typesafe APIs without schemas or code generation. In versions starting from 11.0.0 to before 11.1.1, an unhandled error is thrown when validating invalid connectionParams which crashes a tRPC WebSocket server. This allows any unauthenticated user to cras...

CVE-2025-43855

CVE-2025-43855 affects tRPC 11 WebSocket servers (versions 11.0.0–11.1.0) where validating malformed connectionParams can throw an unhandled error, crashing the server. Any unauthenticated user can trigger this on WebSocket-enabled servers with a createContext method. The issue has been patched i...