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Vulnerability record · CVE-2026-34156 · published 31 March 2026

CVE-2026-34156: Nocobase improper control of dynamically-managed code vulnerability

Nocobase · Nocobase

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.

9.9 CVSS 3.1 Critical EPSS 6.8% · top 6.2% CWE-913 · Improper control of dynamically-managed code
9.9CVSS 3.1 base score
6.8%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
3References, 1 tagged exploit
24 Jul 2026Last modified by NVD

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:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://github.com/nocobase/nocobase/pull/8967 Issue TrackingPatch
https://github.com/nocobase/nocobase/releases/tag/v2.0.28 ProductRelease Notes
https://github.com/nocobase/nocobase/security/advisories/GHSA-px3p-vgh9-m57c ExploitMitigationVendor Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2026-34156), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.