CVE-2026-34156 Details.
NocoBase - VM Sandbox Escape to Remote Code Execution
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To test for this one, the check would have to send requests that could change data on the site. Atlas only ever reads public pages, so it does not run this check.
About CVE-2026-34156. What It Means.
NocoBase 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. 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 (console._stdout.constructor.constructor to Function to process to child_process) to escape the sandbox…
Affected Product. What Is Hit.
- Vendor
- nocobase
- Product
- NocoBase
FAQ
Common Questions.
NocoBase - VM Sandbox Escape to Remote Code Execution. NocoBase 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. 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 (console._stdout.constructor.constructor to Function to process to child_process) to escape the sandbox…
No. To test for this one, the check would have to send requests that could change data on the site. Atlas only ever reads public pages, so it does not run this check. The facts about CVE-2026-34156 are on this page, and you can request a demo to see how Brandefense watches your whole external attack surface.
CVE-2026-34156 is not on the CISA Known Exploited Vulnerabilities list at the time of writing, but it is still worth fixing.
Update NocoBase to the latest version from the vendor, or follow the vendor's advice to switch off the affected feature. Vendor links are listed on this page when they are known.
This page lists the public facts about CVE-2026-34156. Atlas does not run a check for it, so nothing here says whether a particular site is affected.