CVE-2026-30617 Command injection in n/a
Remote attackers can execute arbitrary commands by configuring malicious MCP STDIO servers in LangChain-ChatChat when MCP is enabled.
- 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-2026-30617?
CVE-2026-30617 is a high-severity command injection vulnerability in n/a, published on 15 Apr 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
LangChain-ChatChat 0.3.1 contains a remote code execution vulnerability in its MCP STDIO server configuration and execution handling. A remote attacker can access the publicly exposed MCP management interface and configure an MCP STDIO server with attacker-controlled commands and arguments. When the MCP server is started and MCP is enabled for agent execution, subsequent agent activity triggers execution of arbitrary commands on the server. Successful exploitation allows arbitrary command execution within the context of the LangChain-ChatChat service.
Weakness: CWE-77
Which versions are affected by CVE-2026-30617?
How do I fix CVE-2026-30617?
No fix has been published for CVE-2026-30617 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-2026-30617 being exploited?
There is no known exploitation of CVE-2026-30617 in the wild and no public exploit code.
Sources
Also known as GHSA-w94v-hq49-38vh.