CVE-2025-43855CWE-248

tRPC 11 WebSocket DoS Vulnerability

High · published April 24, 2025

CVSS v4.0
8.7
EPSS
0%
Percentile
34.8
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v4.0
8.7 · HIGH
Vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
EPSS
0.00416 · 34.8th percentile
Weakness
CWE-248 · Uncaught Exception
Published
2025-04-24T13:58Z
EPSS history
Timeline
  • 24 APR 13:58Z
    tRPC 11 WebSocket DoS Vulnerability
    cvelistv5