Langchain-Chatchat <0.3.1.3: Auth Bypass RCE via tools/call
CVE-2026-75128 Published on October 20, 2026
Langchain-Chatchat through 0.3.1.3 Unauthenticated RCE via /tools/call Endpoint
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).
Vulnerability Analysis
CVE-2026-75128 is exploitable with network access, and does not require authorization privileges or user interaction. This vulnerability is considered to have a low attack complexity. The potential impact of an exploit of this vulnerability is considered to have no impact on confidentiality and integrity and availability.
Weakness Type
Missing Authentication for Critical Function
The software does not perform any authentication for functionality that requires a provable user identity or consumes a significant amount of resources.
Products Associated with CVE-2026-75128
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Affected Versions
chatchat-space Langchain-Chatchat:- Before and including 0.3.1.3 is affected.