CVE-2026-34156: critical vulnerability in nocobase
NocoBase Affected by Sandbox Escape to RCE via console._stdout Prototype Chain Traversal in Workflow Script Node
Published · Updated
63Vexday Risk Score
Patch soon. It has a working public exploit.
ssvc Attendcvss 10epss 6.8%
from disclosure to weapon3 days
Published on NVDMar 31
1st PoC+3d
exploitation probability
6.8%top 6% of all CVEs
observed exploitation
nono source reports it
3 public exploit(s)
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.
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
Affected products
nocobase · nocobasepublic PoCs found — 3
exploitdbwww.exploit-db.com/exploits/52552unverifiedgithubgithub.com/0xBlackash/CVE-2026-34156★ 0githubgithub.com/Dhananjayasj/CVE-2026-34156-NocoBase-Sandbox-Escape-via-Workflow-Execution-Vulnerability-★ 0⚠ Public resources, to assess the exposure of systems you control or are authorized to test. Test only with authorization.
Related CVEs — nocobase
In the same product, most dangerous first.
CVE-2026-41640HIGHNocoBase Vulnerable to SQL Injection via String Concatenation in Recursive Eager LoadingEPSS 2.4%CVE-2026-41641HIGHNocoBase Vulnerable to SQL Validation Bypass via `sqlCollection:update` Missing `checkSQL` CallEPSS 2.4%CVE-2026-52887CRITICALNocoBase: SQL injection in /api/myInAppChannels:list filter to PG-superuser RCEEPSS 0.9%CVE-2026-55410MEDIUMNocoBase backup restore schema name allows command injectionEPSS 0.7%CVE-2026-34825HIGHNocoBase Has SQL Injection via template variable substitution in workflow SQL nodeEPSS 0.5%CVE-2026-52888MEDIUMNocoBase: Sensitive Data Exposure via SQL Blacklist BypassEPSS 0.5%