CVE-2026-30618 Command injection in n/a
Remote attackers can execute arbitrary commands by configuring the MCP STDIO server with malicious parameters in Fay.
- 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-2026-30618?
CVE-2026-30618 is a critical command injection vulnerability in n/a, published on 15 Jul 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
xszyou Fay 4.3.1 contains a remote code execution vulnerability in its MCP STDIO server management and command execution handling. A remote attacker can access the publicly exposed MCP management interface and configure an MCP STDIO server with attacker-controlled commands and parameters, resulting in execution of arbitrary commands on the server. Successful exploitation allows arbitrary command execution within the context of the Fay service.
Weakness: CWE-94
Which versions are affected by CVE-2026-30618?
How do I fix CVE-2026-30618?
No fix has been published for CVE-2026-30618 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-2026-30618 being exploited?
There is no known exploitation of CVE-2026-30618 in the wild and no public exploit code.
Sources
Also known as GHSA-84x8-v67g-jc27.