VULNERABILITY INTELLIGENCE

CVE-2026-58057

CVSS score5 MEDIUM
EPSS probability1.56%
CISA KEVNot currently listed
Published2026-06-28
Last modified2026-10-25
CVSS vectorCVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:L

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.

Weakness classification

  • disclosure@vulncheck.com: CWE-178

Primary references