Neo4j Cypher MCP server is vulnerable to DNS rebinding attacks
Priority LOW 34CWE-346Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- Active
- Attack complexity
- High
- Attack requirements
- Present
- Impact type
- Security bypass
- Confidentiality · integrity · availability
- High · High · None
- Fix status
- Fixed
Attack profile from CVSS 4.0 · CNA. Fix status from CNA and GitHub. Impact type from CWE-346.
Summary
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.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00221 12th percentileScored 2026-11-07
Fix Fixed mcp-neo4j-cypher (PyPI): 0.4.0
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Total
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| neo4j | neo4j-cypher MCP server | 0.2.2 – 0.3.1 | — | No fix listed | CNA |
| — | mcp-neo4j-cypher (PyPI) | 0.2.2 to before 0.4.0 | 0.4.0 | Patch available | GHSA-vcqx-v2mg-7chx |
- neo4j-cypher MCP server Vendorneo4j Affected 0.2.2 – 0.3.1 Fixed in — No fix listed CNA
- mcp-neo4j-cypher (PyPI) Vendor— Affected 0.2.2 to before 0.4.0 Fixed in 0.4.0 Patch available GHSA-vcqx-v2mg-7chx
Remediation
- Fix · GHSA-vcqx-v2mg-7chx mcp-neo4j-cypher (PyPI) Fixed in 0.4.0 Advisory →
Timeline
- 2026-10-02 Threatist record created from CVE-2025-10193
- 2026-10-03 Alias added: GHSA-vcqx-v2mg-7chx
References
Advisory 3
More neo4j vulnerabilities
- TI-2021-13406 Neo4j through 3.4.18 (with the shell server enabled) exposes an RMI service that… CVSS 3.1CRITICAL 9.8
- TI-2026-71015 Authentication ignored for top-level @cypher fields in @neo4j/graphql CVSS 4.0CRITICAL 9.3
- TI-2018-16042 neo4j-contrib neo4j-apoc-procedures version before commit 45bc09c contains a XML External… CVSS 3.0CRITICAL 10.0
- TI-2018-13005 Due to incorrect access control in Neo4j Enterprise Database Server 3.4.x before 3.4.9… CVSS 3.0CRITICAL 9.8
- TI-2021-18971 A directory traversal vulnerability in the apoc plugins in Neo4J Graph database before… CVSS 3.1CRITICAL 9.1
- TI-2026-01049 Insufficient escaping of unicode characters in query log CVSS 4.0LOW 1.1
Sources
- CVE-2025-10193 · CVE Program
- CVE-2025-10193 · NVD
- FIRST EPSS
- GHSA-vcqx-v2mg-7chx · GitHub Advisory Database · CC BY 4.0
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