---
id: CVE-2025-10193
aliases:
  - GHSA-vcqx-v2mg-7chx
  - PYSEC-2026-1620
title: ' Neo4j Cypher MCP server is vulnerable to DNS rebinding '
summary: ' Neo4j Cypher MCP server is vulnerable to DNS rebinding '
severity: high
vendor: mcp-neo4j-cypher
product: mcp-neo4j-cypher
ecosystem: pip
affected:
  - 'mcp-neo4j-cypher >= 0.2.2, < 0.4.0'
patched:
  - mcp-neo4j-cypher 0.4.0
published: '2025-09-11'
updated: '2026-07-07'
source: OSV
sourceUrl: 'https://osv.dev/vulnerability/GHSA-vcqx-v2mg-7chx'
references:
  - url: >-
      https://github.com/neo4j-contrib/mcp-neo4j/security/advisories/GHSA-vcqx-v2mg-7chx
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2025-10193'
  - url: 'https://github.com/neo4j-contrib/mcp-neo4j/pull/165'
  - url: >-
      https://github.com/neo4j-contrib/mcp-neo4j/commit/5b9fbdda6401668d7aa006daf7e644805c067c15
  - url: 'https://github.com/neo4j-contrib/mcp-neo4j'
  - url: >-
      https://github.com/neo4j-contrib/mcp-neo4j/releases/tag/mcp-neo4j-cypher-v0.4.0
  - url: 'https://neo4j.com/security/cve-2025-10193'
tags:
  - osv
  - pip
epss: 0.00221
epssPercentile: 0.12845
ingestedAt: '2026-07-08T18:25:53.307Z'
---

## Overview

### Impact
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.&nbsp;The attack relies on the user being enticed to visit a malicious website and spend sufficient time there for DNS rebinding to succeed.

### Patches
CORS Middleware added to Cypher MCP server v0.4.0 that blocks all web-based access by default.

### Workarounds
If you cannot upgrade to v0.4.0 and above, use stdio mode.

### References
[Vendor Advisory](https://neo4j.com/security/cve-2025-10193)
https://www.cve.org/CVERecord?id=CVE-2025-10193 

Credits
We want to publicly recognize the contribution of Evan Harris from [mcpsec.dev](https://mcpsec.dev/) for reporting this issue and following the responsible disclosure [policy](https://neo4j.com/trust-center/responsible-disclosure/).

## Affected packages

- `mcp-neo4j-cypher >= 0.2.2, < 0.4.0`

## Remediation

Upgrade to a patched release:

- `mcp-neo4j-cypher 0.4.0`