High · 7.4 CVE-2025-10193 EUVD-2025-28908GHSA-vcqx-v2mg-7chxPYSEC-2026-1620

Neo4j Cypher MCP server is vulnerable to DNS rebinding attacks

Published Sep 11, 2025 · Updated Feb 26, 2026 · Assigned by Neo4j

Vendor: neo4j Product: neo4j-cypher MCP server Package: mcp-neo4j-cypher Ecosystem: PyPI

Description

DNS rebinding vulnerability in Neo4j Cypher MCP server allows malicious websites to bypass Same-Origin Policy protections and execute unauthorised tool invocations against locally running Neo4j MCP instances. The attack relies on the user being enticed to visit a malicious website and spend sufficient time there for DNS rebinding to succeed.

Affected products

Vendor	Product	Affected	Fixed
neo4j	neo4j-cypher MCP server	0.2.2 – ≤ 0.3.1	—

Affected packages

Ecosystem	Package	Affected	Fixed	Record
PyPI	mcp-neo4j-cypher	>= 0.2.2, < 0.4.0	0.4.0	GHSA-vcqx-v2mg-7chx

References

https://neo4j.com/security/cve-2025-10193 vendor-advisory
https://github.com/neo4j-contrib/mcp-neo4j/security/advisories/GHSA-vcqx-v2mg-7chx third-party-advisory
https://github.com/neo4j-contrib/mcp-neo4j/releases/tag/mcp-neo4j-cypher-v0.4.0 release-notes