CVE-2026-34156Public exploitNetwork attack vector

Authenticated root code execution via exposed console streams

Published Mar 31, 2026 · Updated Mar 31, 2026

Sandbox escape in NocoBase before 2.0.28 allows remote authenticated users to execute arbitrary code as root through a workflow script. The Workflow Script Node passes host-realm WritableWorkerStdio objects through console._stdout and console._stderr into its Node.js vm context, exposing Function through their constructor chains. Any authenticated user able to call /api/flow_nodes:test can bypass the module allowlist, load child_process, and read or write files, steal environment-held database credentials, or open a reverse shell.

CVSS severity9.9
Critical
EPSS probability34.97%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Sandbox escape in NocoBase before 2.0.28 allows remote authenticated users to execute arbitrary code as root through a workflow script. The Workflow Script Node passes host-realm WritableWorkerStdio objects through console._stdout and console._stderr into its Node.js vm context, exposing Function through their constructor chains. Any authenticated user able to call /api/flow_nodes:test can bypass the module allowlist, load child_process, and read or write files, steal environment-held database credentials, or open a reverse shell.

The record

CVE
CVE-2026-34156
Published
Mar 31, 2026
Updated
Mar 31, 2026
Vendor
NocoBase
Product
NocoBase
Classifications
CWE-913, T1059.007, T1190
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Mar 31, 2026CVE publishedPublication date reported by the CVE source.
  2. Mar 31, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=< 2.0.28

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

NocoBase · NocoBaseversion=< 2.0.28

Published CVSS scores

9.9GitHubCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-913Improper Control of Dynamically-Managed Code Resources
T1059.007JavaScript/JScript
T1190Exploit Public-Facing Application

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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