MCP Java SDK is the official Java SDK for Model Context Protocol servers and clients.

Code

The project this record applies to. Exploit listings stay in References.

• Repository · github.com

Timeline

Detection, updates, and resolution for this record.

1. Mar 31, 2026 · NIST NVD

   Detected

   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.

2. Jul 24, 2026 · NIST NVD

   Updated

   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.

Affected

• cpe lfprojects/mcp java sdkversion unspecified
• cpe lfprojects/mcp java sdk1.1.0

Sources

• CVE.orgVulnerability recordCVE-2026-34237

  Official CVE identifier

  cve.org
• NIST NVDVulnerability recordCVE-2026-34237

  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.

  nvd.nist.gov

References

• Patch · github.com
• Patch · github.com
• Mitigation · github.com