CVE-2026-75128
Critical
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).
SeverityCritical
CVSS9.8
Exploit probability—
ProductLangchain-Chatchat
PublishedOct 20, 2026
First seenOct 20, 2026
Weakness typeCWE-306Missing authentication for critical function
How to fix
Sources list no fixed version or patch link for this vulnerability.
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| chatchat-space Langchain-Chatchat | v ≤ 0.3.1.3 | — |
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