CVE-2025-56406 Command injection in n/a
Attackers can execute arbitrary commands or read sensitive data via the SSE service in the mcp-neo4j library, particularly if exposed externally.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2025-56406?
CVE-2025-56406 is a high-severity command injection vulnerability in n/a, published on 10 Sep 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
An issue was discovered in mcp-neo4j 0.3.0 allowing attackers to obtain sensitive information or execute arbitrary commands via the SSE service. NOTE: the Supplier's position is that authentication is not mandatory for MCP servers, and the mcp-neo4j MCP server is only intended for use in a local environment where authentication realistically would not be needed. Also, the Supplier provides middleware to help isolate the MCP server from external access (if needed).
Which versions are affected by CVE-2025-56406?
How do I fix CVE-2025-56406?
No fix has been published for CVE-2025-56406 yet. Limit exposure of the affected software until one is available.
Upgrade, and pass arguments to programs as a list instead of through a shell. More about Command injection.
Is CVE-2025-56406 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-56406 exists.
Sources
Also known as GHSA-78w9-7xq3-h66c.