MCP Java SDK has a Hardcoded Wildcard CORS (Access-Control-Allow-Origin: *)
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.
Severity medium: primary CNA CVSS 6.1 v3.1 (worst CNA-provided scenario) Not listed in this KEV snapshot. Forecast present in this snapshot.
Published 2026-03-31T15:40:01.070Z. Updated 2026-06-09T18:39:37.473Z.