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CVE-2026-10561 is a critical unauthenticated remote code execution vulnerability in IBM Langflow OSS affecting versions 1.0.0 through 1.9.3. The flaw is in the PythonREPLComponent (Python Interpreter), where Python execution is improperly isolated. The component's globals construction relies on a restricted import whitelist but does not explicitly clear or replace the builtins namespace. As a result, when CPython exec() is invoked without builtins defined in the globals dictionary, the interpreter automatically inserts the full builtins module, making dangerous functionality such as import and file and code execution primitives reachable despite the intended restrictions. The issue can be combined with Langflow's authentication bypass behavior when auto-login is enabled by default, allowing issuance of a privileged session token without credentials. Together, these conditions permit a remote unauthenticated attacker to reach the Python execution path and run arbitrary code on the underlying host.
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A remote code execution vulnerability in Langflow OSS involving the Python interpreter component.
A critical unauthenticated remote code execution vulnerability in IBM Langflow caused by authentication bypass combined with improper isolation of Python execution.
A critical unauthenticated remote code execution vulnerability in IBM Langflow OSS caused by improper isolation of Python execution combined with an authentication bypass, allowing arbitrary code execution and full host compromise.
An unauthenticated remote code execution vulnerability in Langflow OSS caused by improper isolation of Python execution in PythonREPLComponent combined with an authentication bypass, allowing arbitrary code execution and complete host compromise.
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