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CVE-2026-46442

CRITICAL Exploitation: PoC
9.4
CVSS 4.0
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.

Metadata

CVE ID
CVE-2026-46442
State
PUBLISHED
Assigner
GitHub_M
Reserved
2026-05-13 22:18 UTC
Published
2026-06-08 15:30 UTC
Last updated
2026-06-09 14:35 UTC
Primary CWE
CWE-94
CWE-94: Improper Control of Generation of Code ('Code Inject…
Vendor / Product
FlowiseAI / Flowise
Sources
cve.org  ·  NVD

Severity & Metrics

9.4 CRITICAL CVSS 4.0
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H
SSVC — CISA Coordinator
Exploitation
PoC
Automatable
no
Tech. Impact
total
Affected products (1)
VendorProductPlatformVersions
FlowiseAI Flowise — < 3.1.2
Weakness (CWE)
CWESourceDescription
CWE-94 cna CWE-94: Improper Control of Generation of Code ('Code Injection')
CVSS scores (1)
ScoreSeverityVersionSourceVector
9.4 CRITICAL 4.0 cna CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H
References (2)
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