Langchain-Chatchat through 0.3.1.3 exposes a POST /tools/call API endpoint that invokes any registered tool by name without authentication, leaving the always-registered shell tool callable. Remote attackers can send a single request naming the shell tool to execute arbitrary OS commands as the server user (root in the shipped Docker image).
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Fixes

Solution

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Workaround

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History

Tue, 20 Oct 2026 01:15:00 +0000

Type Values Removed Values Added
Description Langchain-Chatchat through 0.3.1.3 exposes a POST /tools/call API endpoint that invokes any registered tool by name without authentication, leaving the always-registered shell tool callable. Remote attackers can send a single request naming the shell tool to execute arbitrary OS commands as the server user (root in the shipped Docker image).
Title Langchain-Chatchat through 0.3.1.3 Unauthenticated RCE via /tools/call Endpoint
First Time appeared Chatchat-space
Chatchat-space langchain-chatchat
Weaknesses CWE-306
CPEs cpe:2.3:a:chatchat-space:langchain-chatchat:*:*:*:*:*:*:*:*
Vendors & Products Chatchat-space
Chatchat-space langchain-chatchat
References
Metrics cvssV3_1

{'score': 9.8, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H'}

cvssV4_0

{'score': 9.3, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N'}


Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: VulnCheck

Published:

Updated: 2026-10-20T00:46:08.977Z

Reserved: 2026-08-17T18:39:57.660Z

Link: CVE-2026-75128

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Received

Published: 2026-10-20T01:17:19.063

Modified: 2026-10-20T01:17:19.063

Link: CVE-2026-75128

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-10-20T03:00:16Z

Weaknesses