CVE-2026-75128

Langchain-Chatchat through 0.3.1.3 Unauthenticated RCE via /tools/call Endpoint

Published Oct 20, 2026 CVSS 4.0 · 9.3 Critical EPSS 2.2% KEV · Not listed
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).

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'poc', 'Technical Impact': 'total'}, 'version': '2.0.3'}

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'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
VulnCheck
Published
Updated
Oct 20, 2026, 2:34 PM
Reserved
Aug 17, 2026, 6:39 PM
Status
Awaiting Analysis
Published
Oct 20, 2026, 1:17 AM
Modified
Oct 20, 2026, 8:06 PM