CRITICAL 9.0 NVD
CVE-2026-119978
Flowise through 3.1.4 contains a sandbox escape vulnerability that allows authenticated users to execute OS commands by abusing allowlisted langchain and mammot
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.
References
- https://github.com/FlowiseAI/Flowise
- https://github.com/FlowiseAI/Flowise/blob/a65f81bb43ef66d3ce734bf0dff4223ae8041c95/package
- https://github.com/FlowiseAI/Flowise/blob/a65f81bb43ef66d3ce734bf0dff4223ae8041c95/package
- https://github.com/advisories/GHSA-9gvv-qjj3-2p6g
- https://www.vulncheck.com/advisories/flowise-through-3.1.4-custom-function-sandbox-escape-
This critical severity vulnerability with a CVSS score of 9.0 was published on 2026-10-30 via NVD.
Risk Timeline
CVE Disclosed2026-10-30 · -1 days ago
Remediation Resources
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