Vulnerability details

CVE-2025-43855

trpc trpc

tRPC 11 WebSocket DoS Vulnerability

CVSS 4.0

8.7High

Official 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.

CVSS scores

Score	Version	Source	Vector
8.7High	4.0	CVEProject cvelistV5 (CNA) (GitHub_M)	`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`

Affected products

Vendor	Product	Versions	Source
trpc	trpc	>= 11.0.0, < 11.1.1	CVEProject cvelistV5 (CNA)

References and advisories

https://github.com/trpc/trpc/security/advisories/GHSA-pj3v-9cm8-gvj8 x_refsource_CONFIRM
https://github.com/trpc/trpc/commit/9beb26c636d44852e0f407f3d7a82ad54df65b4d x_refsource_MISC

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Details

Published: 2025-04-24
Last updated: 2025-05-14
State: Published
Assigner (CNA): GitHub_M

Exploit prediction (EPSS)

0.42%

Probability of exploitation in 30 days

36.8%

Percentile (among all CVEs)

SSVC assessment (CISA)

Automatable: Yes
Exploitation: None
Technical impact: Partial

Weaknesses (CWE)

CWE-248
Uncaught Exception