WebSocket Server Vulnerability in tRPC Affects Multiple Users
CVE-2025-43855

8.7HIGH

Key Information:

Vendor

Trpc

Status
Trpc
Vendor
CVE Published:
24 April 2025

What is CVE-2025-43855?

An improper error handling vulnerability in tRPC versions from 11.0.0 to 11.1.0 allows unauthenticated users to crash the WebSocket server. The vulnerability arises when invalid connection parameters are validated, leading to an unhandled error that brings down the server. This affects any tRPC 11 WebSocket server configured with a createContext method. The issue has since been resolved in version 11.1.1.

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Affected Version(s)

trpc >= 11.0.0, < 11.1.1

References

https://github.com/trpc/trpc/security/advisories/GHSA-pj3...
x_refsource_CONFIRM
https://github.com/trpc/trpc/commit/9beb26c636d44852e0f40...
x_refsource_MISC

CVSS V4

Score:
8.7
Severity:
HIGH
Confidentiality:
None
Integrity:
None
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • Vulnerability published

  • Vulnerability Reserved

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