9.0
Critical
Flowise through 3.1.4 contains a sandbox escape vulnerability that allows authenticated users to execute OS commands by abusing allowlisted…
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 mammoth modules when ALLOWBUILTINDEP=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.
Part of the AI stack
This affects Flowise, in Agent frameworks.
Assessment
- CVSS
- 9 (v4.0)
- Severity
- Critical
- EPSS
- 0% chance of exploitation in the next 30 days
- Known exploited
- Not listed in CISA KEV
- Exploit availability
- Nothing found in Exploit-DB, Metasploit, Nuclei or public PoC repositories
- Published
- 30 October 2026
- Last updated
- 30 October 2026
- Affected
- FlowiseAI
- Weakness
- CWE-749
- Assigner
- disclosure@vulncheck.com
CVSS vectorCVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H
At the source
References
- https://github.com/FlowiseAI/Flowise
- https://github.com/FlowiseAI/Flowise/blob/a65f81bb43ef66d3ce734bf0dff4223ae8041c95/packages/components/src/utils.ts#L1733
- https://github.com/FlowiseAI/Flowise/blob/a65f81bb43ef66d3ce734bf0dff4223ae8041c95/packages/components/src/utils.ts#L55-L114
- https://github.com/advisories/GHSA-9gvv-qjj3-2p6g
- https://www.vulncheck.com/advisories/flowise-through-3.1.4-custom-function-sandbox-escape-rce-via-localfilestore
- https://nvd.nist.gov/vuln/detail/CVE-2026-119978
- https://github.com/advisories/GHSA-7pc2-8w3w-pqfg
Outside the current feed window — resolved directly from NVD, GitHub Advisories, EUVD (ENISA) when you asked for it.
Query this programmatically
Agents can read this through the MCP endpoint, or over HTTP:
curl https://cve.zerocrew.in/api/cve/CVE-2026-119978