A remote code execution (RCE) vulnerability, CVE-2026-67544, was discovered in Heym's workflow engine prior to version 0.0.71. The vulnerability occurs when an authenticated user submits arbitrary Python code through the Playwright node's playwrightCode field, which is then executed directly by the backend process without sandboxing or validation. This allows for RCE on the backend host, potentially running as the root user in default Docker deployments. The issue has been patched in version 0.0.71.