Vulnerability Description
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 crash a tRPC 11 WebSocket server. Any tRPC 11 server with WebSocket enabled with a createContext method set is vulnerable. This issue has been patched in version 11.1.1.
Related Weaknesses (CWE)
References
- https://github.com/trpc/trpc/commit/9beb26c636d44852e0f407f3d7a82ad54df65b4d
- https://github.com/trpc/trpc/security/advisories/GHSA-pj3v-9cm8-gvj8
FAQ
What is CVE-2025-43855?
CVE-2025-43855 is a documented vulnerability. 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 con...
How severe is CVE-2025-43855?
CVSS scoring is not yet available for CVE-2025-43855. Check NVD for updates.
Is there a patch for CVE-2025-43855?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.