Vulnerability in Flowise

CVE-2026-58057

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 den…

CVSS v3 metric

CVSS v3 base score 5.0 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:L.

Affected products

Weakness classification (CWE)

References

Frequently asked questions

What is CVE-2026-58057?
CVE-2026-58057 is a medium-severity vulnerability in Flowise, classified under Improper Handling of Case Sensitivity. CVSS score: 5.0/10. Published 2026-06-28.
How severe is CVE-2026-58057?
Medium severity. CVSS v3 base score is 5.0 out of 10.