Critical 10.0Published Mar 31, 2026

CVE-2026-34156NocoBase Affected by Sandbox Escape to RCE via console._stdout Prototype Chain Traversal in Workflow Script Node

Updated under an hour ago (Oct 27, 2026, 7:40 PM ET)

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No exploitation reported and no EPSS estimate yet.

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Exploited in the last 30 days

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: 10.0 CRITICAL (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
Weakness (CWE): CWE-913
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: GitHub_M
NVD analysis: Analyzed
Record last updated: Apr 2, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

nocobase nocobase nocobase:nocobase (from the name)	before 2.0.28	CNA record
nocobase nocobase nocobase:nocobase	before 2.0.28	NVD

References

References

https://github.com/nocobase/nocobase/security/advisories/GHSA-px3p-vgh9-m57c	x-refsource-confirm, exploit, mitigation, vendor-advisory
https://github.com/nocobase/nocobase/pull/8967	x-refsource-misc, issue-tracking, patch
https://github.com/nocobase/nocobase/releases/tag/v2.0.28	x-refsource-misc, product, release-notes

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.