Vulnerability Description
Flowise is a drag & drop user interface to build a customized large language model flow. Prior to version 3.1.2, POST /api/v1/node-custom-function lacks route-level authorization, allowing any authenticated user or API key to submit arbitrary JavaScript to the Custom JS Function node. When E2B_APIKEY is not configured — the common deployment case — Flowise executes this code inside a NodeVM sandbox. This sandbox can be escaped, allowing an attacker to reach the host process object and execute system commands via child_process. The result is authenticated remote code execution on the Flowise server host. This issue has been patched in version 3.1.2.
CVSS Score
CRITICAL
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Flowiseai | Flowise | < 3.1.2 |
Related Weaknesses (CWE)
References
- https://github.com/FlowiseAI/Flowise/releases/tag/flowise%403.1.2ProductRelease Notes
- https://github.com/FlowiseAI/Flowise/security/advisories/GHSA-9rvc-vf7m-pgm2ExploitMitigationVendor Advisory
- https://github.com/FlowiseAI/Flowise/security/advisories/GHSA-9rvc-vf7m-pgm2ExploitMitigationVendor Advisory
FAQ
What is CVE-2026-46442?
CVE-2026-46442 is a vulnerability with a CVSS score of 9.9 (CRITICAL). Flowise is a drag & drop user interface to build a customized large language model flow. Prior to version 3.1.2, POST /api/v1/node-custom-function lacks route-level authorization, allowing any authent...
How severe is CVE-2026-46442?
CVE-2026-46442 has been rated CRITICAL with a CVSS base score of 9.9/10. This is considered a critical vulnerability requiring immediate attention.
Is there a patch for CVE-2026-46442?
Check the references section above for vendor advisories and patch information. Affected products include: Flowiseai Flowise.