nocobase: Improper Control of Dynamically-Managed Code Resources
CVE-2026-34156 is a critical-severity improper control of dynamically-managed code resources vulnerability in nocobase, with a CVSS 3.1 base score of 9.9 out of 10. It can be exploited remotely over the network by an attacker with a low-privileged account, without any action from a user. Affected nocobase versions: < 2.0.28. The record does not name a fixed version, so check the vendor advisory. There is no confirmed exploitation so far. EPSS estimates a 35% chance of exploitation within 30 days, which is in the top 1.54% of all scored CVEs.
Critical severity: a successful attack would have severe impact.
What to do
- Check which version of nocobase you run against the affected versions below, and install the vendor's latest release.
- Read the advisory on github.com for workarounds and exact fixed builds.
Affected products and versions
Version data comes from the organisation that assigned the CVE. Confirm against the vendor advisory before deciding you are unaffected.
How the severity score breaks down
- Attack vector
- NetworkCan be exploited remotely over a network, including the internet.
- Attack complexity
- LowNo special conditions are needed; the attack works reliably.
- Privileges required
- LowA basic user account is enough.
- User interaction
- NoneNo action by a victim is required.
- Scope
- ChangedThe attack can reach beyond the vulnerable component into other systems.
- Confidentiality
- HighAll data handled by the component can be read.
- Integrity
- HighData or code can be modified at will.
- Availability
- HighThe component can be taken down completely.
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H. Scored by NVD.
| Scoring system | Score | Severity | Scored by |
|---|---|---|---|
| CVSS 3.1 | 9.9 | Critical | CNA (github.com) |
| CVSS 3.1 | 9.9 | Critical | NVD |
Official 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.
Source: the CVE record as published by its numbering authority, via NVD and CVE.org.
The underlying weakness: Improper Control of Dynamically-Managed Code Resources
The product does not properly restrict reading from or writing to dynamically-managed code resources such as variables, objects, classes, attributes, functions, or executable instructions or statements.
How developers prevent this class of flaw
- For any externally-influenced input, check the input against an allowlist of acceptable values.
- Refactor the code so that it does not need to be dynamically managed.
More Improper Control of Dynamically-Managed Code Resources vulnerabilities (CWE-913)
Timeline
- CVE record published.
- CISA published its SSVC assessment (exploitation: poc, automatable: yes, technical impact: total).
- Record last changed materially (score, affected products, status or references).
References
Advisories
- github.com/nocobase/nocobase/security/advisories/GHSA-px3p-vgh9-m57cExploit, Mitigation
Patches and release notes
- github.com/nocobase/nocobase/pull/8967Issue Tracking
- github.com/nocobase/nocobase/releases/tag/v2.0.28Product, Release Notes
Other vulnerabilities in nocobase
- 7.1 High severity
- 7.2 High severity
- 10.0 Critical severity
- 7.2 High severity
- 8.8 High severity
Recent Improper Control of Dynamically-Managed Code Resources vulnerabilities
- 9.1 Critical severity
- 8.8 High severity
- 9.9 Critical severity
- 8.8 High severity
- 8.8 High severity
- 8.7 High severity
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