EUVD Vulnerability Catalog
EUVD-2026-114243
Severity: CRITICAL
Base Score: 9
CVSS Version: 4.0
Vulnerability 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.
CVSS Vector Analysis
Below is the complete, human-readable breakdown of the CVSS metric string: CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H
▪
Attack Vector (AV): Network
▪
Attack Complexity (AC): Low
▪
Attack Requirements (AT): Present
▪
Privileges Required (PR): Low
▪
User Interaction (UI): None
▪
Vulnerability Confidentiality Impact (VC): High
▪
Vulnerability Integrity Impact (VI): High
▪
Vulnerability Availability Impact (VA): High
▪
Subsequent Confidentiality Impact (SC): High
▪
Subsequent Integrity Impact (SI): High
▪
Subsequent Availability Impact (SA): High
Affected Vendors & Systems
Vendor
FlowiseAI
References & Advisory Links
- https://github.com/FlowiseAI/Flowise/blob/a65f81bb43ef66d3ce734bf0dff4223ae8041c95/packages/components/src/utils.ts#L55-L114
- https://github.com/FlowiseAI/Flowise/blob/a65f81bb43ef66d3ce734bf0dff4223ae8041c95/packages/components/src/utils.ts#L1733
- https://github.com/advisories/GHSA-9gvv-qjj3-2p6g
- https://github.com/FlowiseAI/Flowise
- 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
Metadata Profile
Database Authority
European Union Agency for Cybersecurity (ENISA) EUVD
Assigner
VulnCheck
EPSS Probability
0
Known Aliases
GHSA-7pc2-8w3w-pqfg
CVE-2026-119978
Published On
2026-10-30
Last Updated
2026-10-30