CVE-2026-35568CWE-346

MCP Java-SDK has a DNS Rebinding Vulnerability

High · published April 7, 2026

CVSS v4.0
7.6
EPSS
0%
Percentile
9.3
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v4.0
7.6 · HIGH
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
EPSS
0.00200 · 9.3th percentile
Weakness
CWE-346 · Origin Validation Error
Published
2026-04-07T21:06Z
EPSS history
Timeline
  • 07 APR 21:06Z
    MCP Java-SDK has a DNS Rebinding Vulnerability
    cvelistv5