CVE-2026-119978

high

Flowise through 3.1.4 contains a sandbox escape vulnerability that allows authenticated users to execute OS commands by abusing allowlisted langchain and mammo…

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.

CVSS

8.5

8.5 (CVSS v3.1)

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

Severity source: NVD CVSS v3.1 (disclosure@vulncheck.com)

Timeline (UTC)

Published: 2026-10-30 18:17

Modified: 2026-10-30 18:17

NVD status: Deferred

Last synced 19 hours ago

Verified against the source API 2026-10-30 18:18 UTC

Exploitation

Not listed in CISA KEV (as of last catalog sync)

Absence from KEV does not mean a CVE is not exploited. Exploitation status: unknown (no authoritative evidence in our sources).

Affected products

Not reported by the source (unknown — not "none").

Weakness classification (CWE)

CWE-749

Source: NVD / CISA. “NVD-CWE-Other” and “NVD-CWE-noinfo” mean NVD could not assign a specific weakness.

Mitigation & advisories

No vendor advisory or patch reference tagged by NVD. Check the references below.

References

https://github.com/FlowiseAI/Flowise disclosure@vulncheck.com
https://github.com/FlowiseAI/Flowise/blob/a65f81bb43ef66d3ce734bf0dff4223ae8041c95/package... disclosure@vulncheck.com
https://github.com/FlowiseAI/Flowise/blob/a65f81bb43ef66d3ce734bf0dff4223ae8041c95/package... disclosure@vulncheck.com
https://github.com/advisories/GHSA-9gvv-qjj3-2p6g disclosure@vulncheck.com
https://www.vulncheck.com/advisories/flowise-through-3.1.4-custom-function-sandbox-escape-... disclosure@vulncheck.com

Data sources

NVD CVE API 2.0 — fetched 2026-10-30 18:18 UTC · record ↗

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