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    CVE-2026-34156

    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.

    Published:Mar 31, 2026
    Last Modified:Apr 21, 2026
    EPS:Mar 31, 2026
    EPSS Score:0.08929
    CVSS Score:10

    Affected Products

    Vendor
    Nocobase
    Product
    Nocobase

    Exploits

    https://github.com/nocobase/nocobase/security/advisories/GHSA-px3p-vgh9-m57chttps://www.exploit-db.com/exploits/52552https://github.com/0xBlackash/CVE-2026-34156https://github.com/Dhananjayasj/CVE-2026-34156-NocoBase-Sandbox-Escape-via-Workflow-Execution-Vulnerability-

    Common Attack Pattern Enumeration and Classification (CAPEC)

    No CAPEC recorded yet

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    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High