PYSEC-2026-1620
See a problem?- Import Source
- https://github.com/pypa/advisory-database/blob/main/vulns/mcp-neo4j-cypher/PYSEC-2026-1620.yaml
- JSON Data
- https://api.osv.dev/v1/vulns/PYSEC-2026-1620
- Aliases
- Published
- 2026-07-07T16:03:04.888877Z
- Modified
- 2026-07-07T17:47:03.417894824Z
- Severity
-
- 7.4 (High) CVSS_V4 - 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 CVSS Calculator
- Summary
- Neo4j Cypher MCP server is vulnerable to DNS rebinding
- Details
-
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://www.cve.org/CVERecord?id=CVE-2025-10193
Credits We want to publicly recognize the contribution of Evan Harris from mcpsec.dev for reporting this issue and following the responsible disclosure policy.
- References
-
- 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
- https://pypi.org/project/mcp-neo4j-cypher
- https://github.com/advisories/GHSA-vcqx-v2mg-7chx
Affected packages
PyPI / mcp-neo4j-cypher
Package
- Name
- mcp-neo4j-cypher
- View open source insights on deps.dev
- Purl
- pkg:pypi/mcp-neo4j-cypher