IBM Langflow OSS up to 1.11.5 MCP Tools privileges management

Summaryinfo

A vulnerability classified as critical was found in IBM Langflow OSS up to 1.11.5. This impacts an unknown function of the component MCP Tools. Such manipulation leads to privileges management. This vulnerability is referenced as CVE-2026-81941. It is possible to launch the attack remotely. No exploit is available.

Detailsinfo

A vulnerability was found in IBM Langflow OSS up to 1.11.5. It has been rated as critical. Affected by this issue is an unknown function of the component MCP Tools. The manipulation with an unknown input leads to a privileges management vulnerability. Using CWE to declare the problem leads to CWE-269. The product does not properly assign, modify, track, or check privileges for an actor, creating an unintended sphere of control for that actor. Impacted is confidentiality, integrity, and availability. CVE summarizes:

IBM Langflow OSS 1.0.0 through 1.11.5 allows an authenticated non-administrative user could execute arbitrary operating system commands on the server at the privilege level of the application process by constructing a flow with an MCP Tools component configured to use a local stdio subprocess transport. This bypasses both the LANGFLOW_CUSTOM_COMPONENT_ADMIN_ONLY and LANGFLOW_BLOCK_CODE_INTERPRETER_COMPONENTS server-side controls intended to prevent exactly this class of access. Successful exploitation could lead to arbitrary command execution, sensitive data exposure (including credentials from the process environment), file system modification, and lateral movement to services reachable from the server.

The advisory is available at ibm.com. This vulnerability is handled as CVE-2026-81941 since 08/27/2026. The exploitation is known to be easy. The attack may be launched remotely. The technical details are unknown and an exploit is not available. The structure of the vulnerability defines a possible price range of USD $5k-$25k at the moment (estimation calculated on 09/11/2026). This vulnerability is assigned to T1068 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.

If you want to get best quality of vulnerability data, you may have to visit VulDB.

Productinfo

Vendor

• IBM

Name

• Langflow OSS

Version

• 1.11.0
• 1.11.1
• 1.11.2
• 1.11.3
• 1.11.4
• 1.11.5

License

• commercial

Website

• Vendor: https://www.ibm.com/

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If you want to get best quality of vulnerability data, you may have to visit VulDB.

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