Remote Command Execution in Langchain-Chatchat by Chatchat Space
CVE-2026-75128

9.3CRITICAL

Key Information:

Vendor

Chatchat-space

Status
Langchain-chatchat
Vendor
CVE Published:
20 October 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-75128?

The Langchain-Chatchat software, up to version 0.3.1.3, exposes a vulnerable API endpoint (/tools/call) that allows remote attackers to execute arbitrary operating system commands without authentication. This flaw stems from the capability of the endpoint to invoke any registered tool by name, thereby permitting unrestricted access to the always-active shell tool. Attackers leveraging this vulnerability can send a crafted request to execute commands as the server user, potentially gaining root access in instances where the product is deployed using the provided Docker image.

Affected Version(s)

Langchain-Chatchat 0 <= 0.3.1.3

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2026-75128 - Proof of Concept

References

https://www.lasso.security/vulnerability-database/cve-202...
technical-descriptionexploit
https://github.com/chatchat-space/Langchain-Chatchat/blob...
technical-description
https://www.vulncheck.com/advisories/langchain-chatchat-t...
third-party-advisory

CVSS V4

Score:
9.3
Severity:
CRITICAL
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

Noy Pearl
Michael Sromin
Ophir Dror
.