CVE-2026-34156

CRITICAL EPSS 98.3%
Published Mar 31, 20263mo ago · Modified Jun 17, 20262w ago
9.9 CVSS 3.1
Critical
Find Similar
Published Mar 31, 2026 3mo ago
Last Modified Jun 17, 2026 2w ago

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 Details

Base Score
9.9
Exploitability
3.1
Impact
6.0
Vector string
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
Attack Vector Network
Attack Complexity Low
Privileges Required Low
User Interaction None
Scope Changed
Confidentiality High
Integrity High
Availability High

Threat Intelligence

EPSS Exploit Probability
98.3% percentile
Exploit & Patch Status
Public Exploit Known
Patch Available

Weaknesses 1

CWE-913

Affected Products 1

VendorProductVersionRange
nocobasenocobase* <2.0.28

References 3

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

Remediation

  • github.com https://github.com/nocobase/nocobase/pull/8967
    Issue TrackingPatch