Is CVE-2026-34156 in the CISA KEV catalog?

No. CVE-2026-34156 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2026-34156?

CVE-2026-34156 has a CVSS v3 base score of 9.9 (CRITICAL).

What is the EPSS score for CVE-2026-34156?

CVE-2026-34156 has an EPSS score of 36.50% (98th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2026-34156?

Upgrade nocobase to 2.0.28 or later.

CVE & CISA-KEV Catalog

CVE-2026-34156

CRITICALEPSS 98th pctl

9.9

CVSS v3

NVD

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.

CWE-913

How to fix

Remediation Available

nocobaseNVD

Affected:< 2.0.28Fixed in:2.0.28CVE-2026-34156derived from NVD

TridentStack Control can deploy fixes like this automatically across your Windows, macOS, and Linux fleet. See how it works

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredLow

User InteractionNone

ScopeChanged

Impact

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

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

Exploit Intelligence

36.50%probability of exploitation in 30 days

98thpercentile

Very high risk: more likely to be exploited than 98% of all known CVEs.

References

Patch1

github.com

Exploit1

github.com

Release Notes1

github.com

Related Vulnerabilities

Other CWE-913 vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2025-68613	Critical	9.9	98%	KEV	Fix
CVE-2023-50386	High	8.8	84%	-	Fix
CVE-2023-43177	Critical	9.8	82%	-	Fix
CVE-2023-29017	Critical	10.0	63%	-	Fix
CVE-2022-36067	Critical	10.0	48%	-	Fix
CVE-2023-6184	Medium	5.0	47%	-	-

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-04-07.