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CVE-2026-34237

NVD

https://nvd.nist.gov/vuln/detail/CVE-2026-34237

Severity

6.1

Medium

CVSS V3

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Summary

MCP Java SDK has a Hardcoded Wildcard CORS (Access-Control-Allow-Origin: *)

Description

MCP Java SDK is the official Java SDK for Model Context Protocol servers and clients. Prior to versions 0.83.0, 1.0.1, and 1.1.1, there is a hardcoded wildcard CORS vulnerability. This issue has been patched in versions 0.83.0, 1.0.1, and 1.1.1.

References

Affected packages

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