CVE-2026-0863

CVE-2026-0863 affects n8n’s python-task-executor sandbox. A crafted payload via the Code block, by an authenticated user with basic permissions, can bypass sandbox restrictions through string formatting and exception handling, enabling arbitrary Python code execution on the host in Internal execu...

CVE-2026-0863 Sandbox escape in n8n Python task runner allows for arbitrary code execution on the underlying host.

Using string formatting and exception handling, an attacker may bypass n8n's python-task-executor sandbox restrictions and run arbitrary unrestricted Python code in the underlying operating system. The vulnerability can be exploited via the Code block by an authenticated user with basic permissio...