RCE in Flowiseai Flowise
CVE-2026-46442
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.
Vulnerability class: RCE (Remote Code Execution)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 9.9 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.034 (88.8th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 89th percentile — 88.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.034 · newest: 0.034 · change: 0.000
Affected products
- Flowiseai Flowise — versions < 3.1.2
Weakness classification (CWE)
Public proof-of-concept exploits
References
- github.com/FlowiseAI/Flowise/releases/tag/flowise@3.1.2 (Product, Release Notes)
- github.com/FlowiseAI/Flowise/security/advisories/GHSA-9rvc-vf7m-pgm2 (Exploit, Mitigation, Vendor Advisory)
Frequently asked questions
- What is CVE-2026-46442?
- CVE-2026-46442 is a critical-severity vulnerability in Flowiseai Flowise, classified under Code Injection. CVSS score: 9.9/10. Published 2026-06-08.
- How severe is CVE-2026-46442?
- Critical severity. CVSS v3 base score is 9.9 out of 10.
- Is CVE-2026-46442 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.