CVSS 3.1
9.9 criticalCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:HCVE-2026-34156
Critical (9.9) in nocobase nocobase. EPSS 35% chance of exploitation in the next 30 days. Fixed in @nocobase/plugin-workflow-javascript 2.0.28.
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.
Severity
- EPSS
- 35% chance of exploitation in the next 30 days; higher than 98% of CVEs (scores of 2026-10-31)
- CWE
- CWE-913
- Published
- Modified
- Record from
- the NVD, synced
Affected
- nocobase:nocobase
Packages (OSV)
| Advisory | Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|---|
| GHSA-px3p-vgh9-m57c | npm | @nocobase/plugin-workflow-javascript | <2.0.28 | 2.0.28 |