CVE-2026-30617
HIGH EPSS 37.3%
Published Apr 15, 20262mo ago · Modified Jun 17, 20261w ago
8.6 CVSS 3.1
Published Apr 15, 2026 2mo ago
Last Modified Jun 17, 2026 1w ago
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.
CVSS Details
Base Score
Exploitability
Impact
Vector string
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction None
Scope Unchanged
Confidentiality Low
Integrity Low
Availability High
Threat Intelligence
EPSS Exploit Probability
37.3% percentile
Exploit & Patch Status
No Known Exploit
No Patch Available
Weaknesses 1
CWE-77 Command Injection Injection
References 1
- ox.security https://www.ox.security/blog/mcp-supply-chain-advisory-rce-vulnerabilities-across-the-ai-ecosystem/
Remediation
No remediation data recorded yet
Check vendor advisories and the NVD entry for patch availability.