CVE-2026-58057
Flowise - Custom MCP Environment Variable Denylist Bypass via Case Sensitivity
Vexday Risk Score
28Bajo
Decisión SSVC (CISA)
Attend
PoC disponible → seguir de cerca
CVSS 2.3EPSS 0.2%KEV nãoPoC públicaNuclei —Metasploit —Patch —
Ciclo de vida
28 jun 2026Publicada en NVD
Recomendación: Planificar corrección próxima — ya existe PoC pública.
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.
CVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N
Productos afectados
Flowise · FlowisePoCs públicas encontradas — 1
cve_referencegithub.com/bikini/exploitarium/tree/main/flowise-mcp-env-case-bypass-pocno verificado⚠ Recursos públicos, para evaluar la exposición de sistemas que controlas o estás autorizado a probar. Prueba solo con autorización.