CVE-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.
Published:Mar 31, 2026
Last Modified:Jun 9, 2026
EPS:Mar 31, 2026
EPSS Score:0.00014
CVSS Score:6.1
Affected Products
Vendor
Product
Action
Vendor
Lfprojects
Product
Mcp Java Sdk
Lfprojects
Mcp Java Sdk
Vendor
Modelcontextprotocol
Product
Java-sdk
Modelcontextprotocol
Java-sdk
Exploits
No exploit reference
Common Weakness Enumeration
Common Attack Pattern Enumeration and Classification (CAPEC)
No CAPEC recorded yet
References
Common Vulnerability Scoring System
Attack Vector
Network
Adjacent
Local
Physical
Privileges Required
None
Low
High
User Interaction
None
Required
Scope
Unchanged
Changed
Confidentiality
None
Low
High
Integrity
None
Low
High
Availability
None
Low
High
