Critical severity9.8NVD Advisory· Published Oct 20, 2026
CVE-2026-75128
CVE-2026-75128
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).
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Affected products
1- Range: <=0.3.1.3
Patches
Vulnerability mechanics
References
3- github.com/chatchat-space/Langchain-Chatchat/blob/a6a9193b5002061719f0eee62c6310bd5b1b7f63/libs/chatchat-server/chatchat/server/api_server/tool_routes.pynvd
- www.lasso.security/vulnerability-database/cve-2026-75128nvd
- www.vulncheck.com/advisories/langchain-chatchat-through-0.3.1.3-unauthenticated-rce-via-tools-call-endpointnvd
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