CVE-2025-43855 Details
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.
A denial-of-service vulnerability has been identified in tRPC versions 11.0.0 prior to 11.1.1. The issue arises when the server encounters invalid connection parameters, leading to an unhandled error that crashes the WebSocket server. This vulnerability allows any unauthenticated user to disrupt a tRPC WebSocket server. The problem occurs on any tRPC 11 server with WebSocket enabled and a context creation method defined.
Users can upgrade to tRPC version 11.1.1 or later to address this vulnerability.
Metrics
CVSS 4.0 Severity and Vector Strings:
VolerionCVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
Volerion
Assessed Apr 24, 2025CISA-ADP
Assessed Apr 24, 2025References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://github.com/trpc/trpc/commit/9beb26c636d44852e0f407f3d7a82ad54df65b4d | [email protected] | Source CodeVendor |
| https://github.com/trpc/trpc/security/advisories/GHSA-pj3v-9cm8-gvj8 | [email protected] | AdvisoryExploitRemedyVendor |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-248 | Uncaught Exception | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| @trpc/server | All versions |
CPE
Remediation
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Change History
3 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jun 17, 2026 | CVE Modified | [email protected] |
| Jun 17, 2026 | CVE Modified | CISA-ADP |
| Apr 24, 2025 | New CVE Received | [email protected] |