CVE-2026-58057

MediumCVSS 5.0/10Last modified Oct 25, 2026

Description

Flowise before 3.1.3 validates Custom MCP stdio environment variables against a denylist using a case-sensitive comparison, so on Windows, where environment names are case-insensitive, supplying 'node_options' bypasses the NODE_OPTIONS denylist entry. An authenticated user who can configure a Custom MCP node can thereby inject NODE_OPTIONS --require and execute arbitrary code in the Flowise server context.

Metrics

CVSS 3.1 5.0/10CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:L

Weakness enumeration

CWE-178

Affected software

No affected versions have been published.

Timeline

Published: Jun 28, 2026
Last modified: Oct 25, 2026
NVD status: Analyzed

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