CVE-2026-34156

Name: CVE-2026-34156
Creator: NVD / NIST
Published: 2026-03-31T14:16:12.17+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9.9/10EPSS 36.50%

Last modified Jun 17, 2026

CVE-2026-34156 is a critical-severity vulnerability rated 9.9/10 on the CVSS scale. 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). EPSS estimates a 36.50% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

9.9/10

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

EPSS Probability

36.50%

98.3th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-913

Affected Software

Vendor	Product	Versions
Nocobase	Nocobase	< 2.0.28

References

https://github.com/nocobase/nocobase/pull/8967Issue Tracking, Patch
https://github.com/nocobase/nocobase/releases/tag/v2.0.28Product, Release Notes
https://github.com/nocobase/nocobase/security/advisories/GHSA-px3p-vgh9-m57cExploit, Mitigation, Vendor Advisory

Timeline

Published: Mar 31, 2026
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2026-34156?

How severe is CVE-2026-34156?

CVE-2026-34156 has a CVSS score of 9.9/10 (CRITICAL severity). The EPSS model estimates a 36.50% probability of exploitation in the next 30 days.

How do I fix CVE-2026-34156?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2026-34156?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST