{"id":"CVE-2026-34156","title":"NocoBase is an AI-powered no-code/low-code platform for building business applications and enterprise solutions","summary":"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 …","severity":"critical","cvss":9.9,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H","cwe":["CWE-913"],"vendor":"nocobase","product":"nocobase","affected":["nocobase < 2.0.28"],"patched":["nocobase 2.0.28"],"published":"2026-03-31","updated":"2026-07-24","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-34156","references":[{"url":"https://github.com/nocobase/nocobase/pull/8967","label":"security-advisories@github.com"},{"url":"https://github.com/nocobase/nocobase/releases/tag/v2.0.28","label":"security-advisories@github.com"},{"url":"https://github.com/nocobase/nocobase/security/advisories/GHSA-px3p-vgh9-m57c","label":"security-advisories@github.com"}],"tags":["nvd","exploit-available"],"epss":0.34966,"epssPercentile":0.98404,"exploitAvailable":true,"ingestedAt":"2026-07-24T22:40:25.441Z","exploits":{"exploitdb":true,"github":2,"githubRepos":["https://github.com/0xBlackash/CVE-2026-34156","https://github.com/Dhananjayasj/CVE-2026-34156-NocoBase-Sandbox-Escape-via-Workflow-Execution-Vulnerability-"],"nuclei":["CVE-2026-34156"],"checkedAt":"2026-09-21T15:28:44.268Z"},"slug":"CVE-2026-34156","body":"## Overview\n\nNocoBase 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.\n\n## Affected\n\n- `nocobase < 2.0.28`\n\n## Remediation\n\nUpgrade past the affected range:\n\n- `nocobase 2.0.28`","depth":"abyssal","depthScore":73,"depthScoreParts":{"impact":54.5,"likelihood":7,"exploitation":12,"ransomware":0},"changes":[]}