CVE-2026-119978

HighCVSS 8.5/10Last modified Nov 6, 2026

Description

Flowise through 3.1.4 contains a sandbox escape vulnerability that allows authenticated users to execute OS commands by abusing allowlisted langchain and mammoth modules when ALLOW_BUILTIN_DEP=true. Attackers can submit JavaScript to /api/v1/node-custom-function that writes a file into the mammoth package via LocalFileStore and requires it, escaping vm2 as the Flowise process user.

Metrics

CVSS 3.1 8.5/10CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H

Weakness enumeration

CWE-749

Affected software

VendorProductVersions
FlowiseAIFlowise<= 3.1.4

References

Timeline

Published
Oct 30, 2026
Last modified
Nov 6, 2026
NVD status
Deferred

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CVE-2026-119978: High severity, CVSS 8.5 | Vulnix