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HIGHCVE-2026-35568Published Modified CNA GitHub_M

CVE-2026-35568: MCP Java-SDK has a DNS Rebinding Vulnerability

MCP Java SDK is the official Java SDK for Model Context Protocol servers and clients. Prior to 1.0.0, the java-sdk contains a DNS rebinding vulnerability. This vulnerability allows an attacker to access a locally or network-private java-sdk MCP server via a victims browser that is either local, or network adjacent. This allows an attacker to make any tool call to the server as if they were a locally running MCP connected AI agent. This vulnerability is fixed in 1.0.0.

Metrics

CVSS v4.0
7.6
Severity
HIGH
Fixed in
—
Affected Products
1
Affected packages
  • modelcontextprotocol / java-sdk
    < 1.0.0
CVSS Vector
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N
References