GHSA-vcqx-v2mg-7chx
GHSA-vcqx-v2mg-7chx is a CWE-346 vulnerability in mcp-neo4j-cypher. O3 Security confirms whether GHSA-vcqx-v2mg-7chx is actually reachable in your code before you act, and blocks exploitation at runtime until you patch.
Neo4j Cypher MCP server is vulnerable to DNS rebinding
Blast Radius
mcp-neo4j-cypherReal-time download stats are indexed for npm and PyPI packages. This vulnerability affects PyPI packages — download data is not available via public APIs for these ecosystems.
Description
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.
Affected Packages
| Ecosystem | Package | Vulnerable range | Fix |
|---|---|---|---|
| 🐍PyPI | mcp-neo4j-cypher | ≥ 0.2.2&&< 0.4.0 | 0.4.0 |
Detection & mitigation playbook
Open-source dependencyDetect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for mcp-neo4j-cypher. O3's reachability analysis confirms whether the vulnerable code path is actually invoked in your application, so you act on real exposure instead of every transitive match.
Fix
Update mcp-neo4j-cypher to 0.4.0 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-vcqx-v2mg-7chx is resolved across your whole dependency graph.
Workarounds
If you can't upgrade right away: gate or disable the affected feature, validate untrusted input at the boundary, and avoid passing attacker-controlled data into the vulnerable path. O3's runtime protection blocks exploitation in production as an interim safeguard until the upgrade lands.
How O3 protects you
O3 pinpoints whether GHSA-vcqx-v2mg-7chx is reachable in your code and exactly where to fix it, then blocks exploitation in production at runtime until the patched version is deployed.
Tailored to GHSA-vcqx-v2mg-7chx. Runtime protection reduces exposure until a permanent patch is applied and verified — it complements patching, it doesn't replace it.
Frequently Asked Questions
Is GHSA-vcqx-v2mg-7chx in your dependencies?
O3 detects GHSA-vcqx-v2mg-7chx across PyPI dependencies and uses function-level reachability to confirm whether the vulnerable code path is actually reachable — not just present. No false positives.