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CVE-2026-8481 is a critical remote code execution vulnerability affecting IBM Langflow OSS versions 1.0.0 through 1.10.0. The flaw resides in the code validation API endpoint, where the POST /api/v1/validate/code route accepts user-supplied Python code and executes it directly via Python's built-in exec() function. The implementation does not apply sandboxing, input validation, or privilege restrictions, allowing attacker-controlled code to run in the server context. Because the vulnerable endpoint is reachable to authenticated users, successful exploitation enables direct execution of arbitrary Python statements and operating system commands with the privileges of the Langflow server process.
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A critical remote code execution vulnerability in the Langflow OSS code validation API endpoint caused by direct execution of user-supplied Python code.
A critical remote code execution vulnerability in IBM Langflow OSS caused by unsafe execution of user-supplied Python code via the /api/v1/validate/code endpoint using exec() without sandboxing or sufficient restrictions.
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