Vulnerability Description
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.
CVSS Score
CRITICAL
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Nocobase | Nocobase | < 2.0.28 |
Related Weaknesses (CWE)
References
- https://github.com/nocobase/nocobase/pull/8967Issue TrackingPatch
- https://github.com/nocobase/nocobase/releases/tag/v2.0.28ProductRelease Notes
- https://github.com/nocobase/nocobase/security/advisories/GHSA-px3p-vgh9-m57cExploitMitigationVendor Advisory
FAQ
What is CVE-2026-34156?
CVE-2026-34156 is a vulnerability with a CVSS score of 9.9 (CRITICAL). 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 JavaScr...
How severe is CVE-2026-34156?
CVE-2026-34156 has been rated CRITICAL with a CVSS base score of 9.9/10. This is considered a critical vulnerability requiring immediate attention.
Is there a patch for CVE-2026-34156?
Check the references section above for vendor advisories and patch information. Affected products include: Nocobase Nocobase.