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CVE PROGRAM SOURCE RECORD9.0 Critical

CVE-2026-119978

Flowise through 3.1.4 Custom Function Sandbox Escape RCE via LocalFileStore

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.

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

FlowiseAI Flowise

Default version status: unaffected

  • 0 to ≤ 3.1.4affected
pkg:github/FlowiseAI/Flowise

References