Vulnerability · Published Sep 11, 2025 · Assigned by Neo4j
CVE-2025-10193Neo4j Cypher MCP server is vulnerable to DNS rebinding attacks
High 7.4
In plain English
A high-severity security flaw in neo4j-cypher MCP server from neo4j. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 13% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official 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 packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| PyPI | mcp-neo4j-cypher | 0.4.0 | GHSA-vcqx-v2mg-7chx |
| PyPI | mcp-neo4j-cypher | 0.4.0 | PYSEC-2026-1620 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| neo4j | neo4j-cypher MCP server | 0.2.2 – through 0.3.1 |
Weakness: CWE-346 · Vector: CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:A/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/AU:N/V:D/RE:L/U:Amber
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