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.

Metrics

Attack Vector Network

Attack Complexity Low

Privileges Required None

Attack Requirements None

User Interaction None

Vulnerable System Confidentiality Impact None

Vulnerable System Integrity Impact None

Vulnerable System Availability Impact High

Subsequent System Confidentiality Impact None

Subsequent System Integrity Impact None

Subsequent System Availability Impact None

No CVSS v3.1

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

The EPSS score is 0.00188.

Exploitation none

Automatable yes

Technical Impact partial

Affected Vendors & Products

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Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References
Link Providers
https://github.com/trpc/trpc/commit/9beb26c636d44852e0f407f3d7a82ad54df65b4d cve-icon cve-icon
https://github.com/trpc/trpc/security/advisories/GHSA-pj3v-9cm8-gvj8 cve-icon cve-icon
History

Thu, 24 Apr 2025 15:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Thu, 24 Apr 2025 14:15:00 +0000

Type Values Removed Values Added
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.
Title tRPC 11 WebSocket DoS Vulnerability
Weaknesses CWE-248
References
Metrics cvssV4_0

{'score': 8.7, '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'}
cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published:

Updated: 2025-05-14T20:07:29.865Z

Reserved: 2025-04-17T20:07:08.555Z

Link: CVE-2025-43855

cve-icon Vulnrichment

Updated: 2025-04-24T14:14:57.256Z

cve-icon NVD

Status : Awaiting Analysis

Published: 2025-04-24T14:15:59.483

Modified: 2025-04-29T13:52:47.470

Link: CVE-2025-43855

cve-icon Redhat

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cve-icon OpenCVE Enrichment

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