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TI-2026-26457 Aliases CVE-2026-34156GHSA-px3p-vgh9-m57c

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

Priority HIGH 82CWE-913Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
None
Attack complexity
Low
Impact type
—
Confidentiality · integrity · availability
High · High · High
Fix status
Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA and GitHub.

Summary

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.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.34966 98th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix Fixed nocobase (nocobase): 2.0.28@nocobase/plugin-workflow-javascript (npm): 2.0.28

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
Yes
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
nocobasenocobasebefore 2.0.282.0.28Patch availableCNA
—@nocobase/plugin-workflow-javascript (npm)before 2.0.282.0.28Patch availableGHSA-px3p-vgh9-m57c
  • nocobase Vendornocobase Affected before 2.0.28 Fixed in 2.0.28 Patch available CNA
  • @nocobase/plugin-workflow-javascript (npm) Vendor— Affected before 2.0.28 Fixed in 2.0.28 Patch available GHSA-px3p-vgh9-m57c

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:nocobase:nocobase:*:*:*:*:*:*:*:*before 2.0.28Vulnerablenocobase
  • cpe:2.3:a:nocobase:nocobase:*:*:*:*:*:*:*:* Versions before 2.0.28 Vulnerable ·nocobase

Remediation

  • Fix · CNA nocobase (nocobase) Fixed in 2.0.28
  • Fix · GHSA-px3p-vgh9-m57c @nocobase/plugin-workflow-javascript (npm) Fixed in 2.0.28 Advisory →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-34156
  2. 2026-10-03 Alias added: GHSA-px3p-vgh9-m57c
  3. 2026-10-25 EPSS moved to the 95th–99th percentile

References

Exploit 1

Patch 1

Advisory 1

Other 2

  • TI-2026-27069 NocoBase Has SQL Injection via template variable substitution in workflow SQL node CVSS 4.0HIGH 8.5
  • TI-2026-30159 NocoBase Vulnerable to SQL Injection via String Concatenation in Recursive Eager Loading CVSS 3.1HIGH 8.8
  • TI-2026-30160 NocoBase Vulnerable to SQL Validation Bypass via `sqlCollection:update` Missing `checkSQL` Call CVSS 3.1HIGH 7.2
  • TI-2026-29121 NocoBase has SSRF in Workflow HTTP Request and Custom Request Plugins CVSS 4.0MEDIUM 6.4

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences