CVE-2026-34156CWE-913

NocoBase Affected by Sandbox Escape to RCE via console._stdout Prototype Chain Traversal in Workflow Script Node

Critical · published March 31, 2026

CVSS v3.1
10.0
EPSS
7%
Percentile
94.0
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
10.0 · CRITICAL
Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
CVSS v4.0
Not supplied
EPSS
0.06793 · 94.0th percentile
Weakness
CWE-913 · Improper Control of Dynamically-Managed Code Resources
Published
2026-03-31T13:33Z
EPSS history
Timeline
  • 25 SEP 03:25Z
    EPSS moved 35% → 7%
    epss
  • 31 MAR 13:33Z
    NocoBase Affected by Sandbox Escape to RCE via console._stdout Prototype Chain Traversal in Workflow Script Node
    cvelistv5