GHSA-vcqx-v2mg-7chx
Neo4j Cypher MCP server is vulnerable to DNS rebinding
Packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| PyPI | mcp-neo4j-cypher | >= 0.2.2, < 0.4.0 | 0.4.0 |
Details
As written in the advisory (Markdown source, shown as plain text).
### 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. 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/).
References
External links from the advisory. They lead to third-party sites.
- https://github.com/neo4j-contrib/mcp-neo4j/security/advisories/GHSA-vcqx-v2mg-7chx
- https://nvd.nist.gov/vuln/detail/CVE-2025-10193
- https://github.com/neo4j-contrib/mcp-neo4j/pull/165
- https://github.com/neo4j-contrib/mcp-neo4j/commit/5b9fbdda6401668d7aa006daf7e644805c067c15
- https://github.com/neo4j-contrib/mcp-neo4j
- https://github.com/neo4j-contrib/mcp-neo4j/releases/tag/mcp-neo4j-cypher-v0.4.0
- https://neo4j.com/security/cve-2025-10193