CVE-2025-43855
High
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.
SeverityHigh
CVSS8.7
Exploit probability—
Product@trpc/server
PublishedApr 24, 2025
First seenApr 24, 2025
Weakness typeCWE-248CWE-248
How to fix
Update
- @trpc/server11.1.1 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| @trpc/servernpm | 11.0.0 ≤ v < 11.1.1 | 11.1.1 |
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