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CVE-2026-75128— Langchain-Chatchat through 0.3.1.3 Unauthenticated RCE via /tools/call Endpoint

Quick assessment

Affected
chatchat-space Langchain-Chatchat
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Langchain-Chatchat 在 0.3.1.3 及以下版本中暴露了一个无需认证的 API 端点，该端点可根据名称调用任何已注册的工具。由于 shell 工具始终处于已注册状态，远程攻击者只需发送一条指定 shell 工具名称的请求，即可以服务器用户身份（在官方提供的 Docker 镜像中为 root 用户）执行任意操作系统命令。

CVSS 9.8 · Critical
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I. Basic Information for CVE-2026-75128

Vulnerability Information
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Vulnerability Title
Langchain-Chatchat through 0.3.1.3 Unauthenticated RCE via /tools/call Endpoint
Source: CVE Program / CVE List V5
Vulnerability 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).
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
关键功能的认证机制缺失
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
chatchat-space Langchain-Chatchat 0 ~ 0.3.1.3 -

II. Public POCs for CVE-2026-75128

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III. Intelligence Information for CVE-2026-75128

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Other References for CVE-2026-75128 (3)

IV. Related Vulnerabilities

Same product: Langchain-Chatchat
Same vendor: chatchat-space
Same weakness: CWE-306

V. Comments for CVE-2026-75128

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