Medium severity · published Apr 7, 2026
CVE-2026-35568
MCP Java-SDK has a DNS Rebinding Vulnerability
5.7
CVSS
0.1%
EPSS
No
On KEV
Description
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.
CVSS vector
CVSS:3.1/AV:A/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N
Attack vector
Adjacent
Complexity
Low
Privileges
None
User interaction
Required
Confidentiality
None
Integrity
High
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.1% · higher than 3% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
JA
java-sdk · modelcontextprotocol
< 1.0.0 · source: vendor
MJ
Mcp Java Sdk · Lfprojects
before 1.0.0 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-35568
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-35568
Release Notes
https://github.com/modelcontextprotocol/java-sdk/releases/tag/v1.0.0
Vendor Advisory
https://github.com/modelcontextprotocol/java-sdk/security/advisories/GHSA-8jxr-pr72-r468
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