chatchat-space Langchain-Chatchat up to 0.3.1.3 Tool Call /tools/call os command injection

Summaryinfo

A vulnerability classified as very critical was found in chatchat-space Langchain-Chatchat up to 0.3.1.3. This vulnerability affects unknown code of the file /tools/call of the component Tool Call Handler. Executing a manipulation can lead to os command injection. This vulnerability is registered as CVE-2026-75128. It is possible to launch the attack remotely. No exploit is available.

Detailsinfo

A vulnerability has been found in chatchat-space Langchain-Chatchat up to 0.3.1.3 and classified as very critical. This vulnerability affects an unknown function of the file /tools/call of the component Tool Call Handler. The manipulation with an unknown input leads to a os command injection vulnerability. The CWE definition for the vulnerability is CWE-78. The product constructs all or part of an OS command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended OS command when it is sent to a downstream component. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

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).

The advisory is available at lasso.security. This vulnerability was named CVE-2026-75128 since 08/17/2026. The exploitation appears to be easy. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. Technical details are known, but there is no available exploit. The structure of the vulnerability defines a possible price range of USD $0-$5k at the moment (estimation calculated on 10/20/2026). This vulnerability is assigned to T1202 by the MITRE ATT&CK project.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

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Productinfo

Type

• Chat Software

Vendor

• chatchat-space

Name

• Langchain-Chatchat

Version

• 0.3.1.0
• 0.3.1.1
• 0.3.1.2
• 0.3.1.3

CPE 2.3info

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CPE 2.2info

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