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archive/Patch now/AIR-2026-1029
closedclosed 15 Apr 2026Patch now2 Disclosed vulnerabilityAI

CVE-2026-30617: Remote Code Execution in LangChain-ChatChat MCP Server

LangChain-ChatChat

LangChain-ChatChat suffers from a remote code execution vulnerability via its MCP STDIO server configuration interface. Remote attackers can configure malicious servers to execute arbitrary commands during subsequent agent activity.

disclosed CVENo confirmed exploitation, so this record is tracked as a disclosed vulnerability and not counted as an incident. It moves into the counts if CISA or the vendor confirms exploitation. Why

CVSS
8.6
EPSS
<0.01 · top 58% · 2026-11-13
EPSS scores by FIRST
fix status
Fix status unknown
first report
15 Apr 2026
last update
15 Apr 2026
CVE ids
CVE-2026-30617other records

Timeline · 1

  1. 15 Apr 2026CVE-2026-30617: LangChain-ChatChat 0.3.1 contains a remote code execution vulnerability in its MCP STDIO server configuration and execution…

Sources · 1

Advisories and databases

  1. 2026-04-15
    CVE-2026-30617: LangChain-ChatChat 0.3.1 contains a remote code execution vulnerability in its MCP STDIO server configuration and execution…
    NVD · nvd.nist.gov/vuln/detail/CVE-2026-30617

Titles and links belong to their publishers. The summary above is written by gcdRadar in its own words; data is CC BY-SA 4.0.

Classification

lane
Patch now
AI role
Attack on AI
categories
Infrastructure vulnerabilityAgent hijack
severity
2 · Disclosed vulnerability
fix status
Fix status unknown
targets
Framework / tooling
owasp llm top 10
LLM03:2025 Supply ChainLLM06:2025 Excessive Agency
mitre atlas
AML.T0053 AI Agent Tool Invocation
tags
rcelangchainmcp
dates
happened 15 Apr 2026 · first reported 15 Apr 2026
origin
NVD
Vulnerability record from NVD / the GitHub Advisory Database. This product uses the NVD API but is not endorsed or certified by the NVD.
record
confidence 0.95 · created 2026-10-18 10:04Z · updated 2026-10-18 10:04Z

Lane, AI role, categories and severity come from the classifier; the OWASP and ATLAS rows are derived from the categories. How these are assigned

Copy a brief

This record as a short Markdown brief, for a ticket, a chat or a coding agent.

the brief as text
# CVE-2026-30617: Remote Code Execution in LangChain-ChatChat MCP Server

https://gcdradar.vercel.app/incidents/cve-2026-30617-remote-code-execution-in-langchain-chatchat-m · AIR-2026-1029 · closed 2026-04-15

- Lane: Patch now
- Severity: 2 (Disclosed vulnerability)
- Fix status: Fix status unknown
- First reported: 2026-04-15
- AI role: Attack on AI
- Products: LangChain-ChatChat
- CVE ids: CVE-2026-30617
- CVSS: 8.6

## Summary

LangChain-ChatChat suffers from a remote code execution vulnerability via its MCP STDIO server configuration interface. Remote attackers can configure malicious servers to execute arbitrary commands during subsequent agent activity.

## What to do

No action recorded; read the sources below and the vendor's advisory.

## Latest updates

- 2026-04-15: CVE-2026-30617: LangChain-ChatChat 0.3.1 contains a remote code execution vulnerability in its MCP STDIO server configuration and execution… (https://nvd.nist.gov/vuln/detail/CVE-2026-30617)

## Sources

- 2026-04-15 NVD: CVE-2026-30617: LangChain-ChatChat 0.3.1 contains a remote code execution vulnerability in its MCP STDIO server configuration and execution… https://nvd.nist.gov/vuln/detail/CVE-2026-30617

Verify against the vendor's advisory before changing production. Data CC BY-SA 4.0, https://gcdradar.vercel.app.

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