CVE-2026-58057: Flowise - Custom MCP Environment Variable Denylist Bypass via Case Sensitivity
Fixed in 3.1.3 · Affected: Flowise before 3.1.3 · Exploitation: possible (1 to 10%)
Not in CyberSIXT coverage yet: no article names this CVE. This page shows the public record.
Higher than 75% of scored CVEs
DescriptionCVE.org
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.
Affected products1
From the CVE record. A product or version that is not listed is unknown, not unaffected.
- Flowise · Flowisebefore 3.1.3
On the Atlas
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CoverageNo articles yet
No CyberSIXT article names CVE-2026-58057 yet, so there is no coverage timeline, action brief or change log for it. Everything on this page comes from the public CVE record, CISA KEV, EPSS and the nuclei template index. Search the archive or see the CVEs in the news.