CVE-2026-75128 PUBLISHED

Langchain-Chatchat through 0.3.1.3 Unauthenticated RCE via /tools/call Endpoint

Assigner: VulnCheck
Reserved: 17.08.2026 Published: 20.10.2026 Updated: 20.10.2026

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).

CVSS Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
CVSS Score: 9.3

Exploitability Metrics		Vulnerable System Impact Metrics		Subsequent System Impact Metrics
Attack Vector	Network	Confidentiality	High	Confidentiality	None
Attack Complexity	Low	Integrity	High	Integrity	None
Attack Requirements	None	Availability	High	Availability	None
Privileges Required	None
User Interaction	None

CVSS 4.0

CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS Score: 9.8

Attack Vector	Network	Scope	Unchanged
Attack Complexity	Low	Confidentiality Impact	High
Privileges Required	None	Integrity Impact	High
User Interaction	None	Availability Impact	High

CVSS 3.1

Product Status

Vendor	chatchat-space
Product	Langchain-Chatchat
Versions	Default: unaffected affected from 0 to 0.3.1.3 (incl.)

CVE-2026-75128 PUBLISHED

Langchain-Chatchat through 0.3.1.3 Unauthenticated RCE via /tools/call Endpoint

Metrics

Product Status

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Problem Types