CVE-2026-75128

9.8Critical

Published 20 Oct 2026 · NVD status: Received · AI triage by gemini-3.8-flash

9.8Critical

Attack vector: Network
Complexity: Low
Privileges needed: None
User interaction: None
Impact: Full C/I/A compromise
Weakness: CWE-306

Impact

Unauthenticated remote attackers can execute arbitrary OS commands as the server user (root by default in Docker containers). They only need network access to send a single HTTP POST request to the server.

Root cause

The POST /tools/call endpoint allows invoking any registered tool by name without authentication, leaving the built-in shell tool directly exposed.

Affected systems

Langchain-Chatchat through 0.3.1.3

CVSS v3.1 · CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Fix & remediation

Upgrade to a fixed version beyond 0.3.1.3 once available; until then, block network access to the /tools/call endpoint using a reverse proxy or take the service offline.

shell

$ pip show langchain-chatchat

AI-suggested. Run it in staging first and check it against the vendor advisory. Why?

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NVD 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).

References

Source: nvd.nist.gov/vuln/detail/CVE-2026-75128