tRPC 11 WebSocket DoS Vulnerability

Description

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.

Recommendation

Update the @trpc/server package to the latest compatible version. Followings are version details:

• Affected version(s): >= 11.0.0, < 11.1.1
• Patched version(s): 11.1.1

References

• GHSA-pj3v-9cm8-gvj8
• CVE-2025-43855
• CWE-248
• CWE-460
• CAPEC-310
• OWASP 2021-A6

Related Issues

• tRPC has possible prototype pollution in `experimental_nextAppDirCaller` - CVE-2025-68130
• Astro Cloudflare adapter has Stored Cross-site Scripting vulnerability in /_image endpoint - CVE-2025-65019
• Finance.js vulnerable to DoS via the seekZero() parameter - CVE-2025-56572
• DoS due to excessively large websocket message in ws - CVE-2016-10542

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Tags:

npm

@trpc/server