CVE-2026-34156
CriticalCVSS 9.9Exploitation Probability (EPSS)
Very high risk98th percentile - higher than 98% of all known CVEs
Summary
NocoBase prior to version 2.0.28 contains a vulnerability in the Workflow Script Node that allows an authenticated attacker to escape the Node.js vm sandbox and achieve Remote Code Execution as root via prototype chain traversal using console._stdout and console._stderr.
Risk Assessment
An authenticated attacker can gain full root-level control over the NocoBase server, potentially leading to complete platform compromise and access to business data.
Recommendation
Update NocoBase to version 2.0.28 or later.
Original NVD description (English source)
NocoBase is an AI-powered no-code/low-code platform for building business applications and enterprise solutions. Prior to version 2.0.28, NocoBase's Workflow Script Node executes user-supplied JavaScript inside a Node.js vm sandbox with a custom require allowlist (controlled by WORKFLOW_SCRIPT_MODULES env var). However, the console object passed into the sandbox context exposes host-realm WritableWorkerStdio stream objects via console._stdout and console._stderr. An authenticated attacker can traverse the prototype chain to escape the sandbox and achieve Remote Code Execution as root. This issue has been patched in version 2.0.28.