---
title: "CVE-2026-75128: Langchain-Chatchat - Command Injection"
description: "Langchain-Chatchat <= 0.3.1.3 contains a command injection caused by unauthenticated access to the /tools/call API endpoint invoking the shell tool, letting remote attackers execute arbitrary OS commands as root, exploit requires no authentication."
url: https://panop.io/threat-heartbeat/CVE-2026-75128/
---

# CVE-2026-75128 Langchain-Chatchat - Command Injection

Langchain-Chatchat <= 0.3.1.3 contains a command injection caused by unauthenticated access to the /tools/call API endpoint invoking the shell tool, letting remote attackers execute arbitrary OS commands as root, exploit requires no authentication.

CVSS base score 9.8 /10

Critical

CISA KEV

Not listed

Public exploit

None known

Authentication

Not required

[View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-75128)

## Details

Type

Command Injection

Impact

Remote Code Execution

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Published

20 October 2026

Updated

20 October 2026

Weakness

[CWE-306](https://cwe.mitre.org/data/definitions/306.html)

## Vendor fix

Update to the latest version of Langchain-Chatchat.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

## References

- [https://nvd.nist.gov/vuln/detail/CVE-2026-75128](https://nvd.nist.gov/vuln/detail/CVE-2026-75128)
- [https://github.com/chatchat-space/Langchain-Chatchat/blob/a6a9193b5002061719f0eee62c6310bd5b1b7f63/libs/chatchat-server/chatchat/server/api\_server/tool\_routes.py#L33](https://github.com/chatchat-space/Langchain-Chatchat/blob/a6a9193b5002061719f0eee62c6310bd5b1b7f63/libs/chatchat-server/chatchat/server/api_server/tool_routes.py#L33)
- [https://www.lasso.security/vulnerability-database/cve-2026-75128](https://www.lasso.security/vulnerability-database/cve-2026-75128)
- [https://www.vulncheck.com/advisories/langchain-chatchat-through-0.3.1.3-unauthenticated-rce-via-tools-call-endpoint](https://www.vulncheck.com/advisories/langchain-chatchat-through-0.3.1.3-unauthenticated-rce-via-tools-call-endpoint)

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## What this record can't tell you

- Whether you run the affected software, and where
- Whether an attacker can actually reach and exploit it
- The misconfigurations that never get a CVE number
- What it would cost the business, ranked into what to fix first

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