CVE-2025-6514 OS command injection in mcp-remote when connecting to untrusted MCP servers
Attackers can execute arbitrary OS commands by providing a malicious authorization endpoint URL to the mcp-remote library.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- Available
What is CVE-2025-6514?
CVE-2025-6514 is a critical command injection vulnerability in mcp-remote, published on 9 Jul 2025. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Official description
mcp-remote is exposed to OS command injection when connecting to untrusted MCP servers due to crafted input from the authorization_endpoint response URL
Weakness: CWE-78
Which versions are affected by CVE-2025-6514?
2 open source packages ship an affected version, including mcp-remote.
| Package | Affected | Fixed in |
|---|---|---|
mcp-remote npm | From 0.0.5 | 0.1.16 |
mcp-remote npm | From 0.0.5 | 0.1.16 |
How do I fix CVE-2025-6514?
Upgrade mcp-remote to 0.1.16 or later.
Upgrade, and pass arguments to programs as a list instead of through a shell. More about Command injection.
Is CVE-2025-6514 being exploited?
There is no known exploitation of CVE-2025-6514 in the wild and no public exploit code.
Public exploit code: 1 proofs of concept on GitHub.
Sources
Also known as GHSA-6xpm-ggf7-wc3p.