CVE-2026-5270: Blue Planet Inventory

Critical severity, CVSS 9.8. EPSS: 0.7% chance of exploitation in the next 30 days.

An authentication bypass vulnerability exists in certain releases of Ciena Navigator Network Control Suite (NCS), Manage Control Plan (MCP), and Blue Planet products. The issue is caused by improper handling of HTTP request paths and headers, which allows an unauthenticated attacker to manipulate requests in a manner that bypasses authentication and associated audit logging controls.

Affected products

• Blue Planet Inventory: up to and including 24.04.001; up to and including 23.12.401; up to and including 23.08.302; up to and including 23.04.701
• Blue Planet Orchestration: up to and including 24.04.2; up to and including 23.12.3; up to and including 23.08.4; up to and including 23.04.2
• Blue Planet Route Optimization & Analysis: up to and including 24.04.1.2-R; up to and including 23.12.1.6-R; up to and including 23.08.1.6-R; up to and including 23.04.P01-9-R
• Blue Planet Unified Assurance & Analytics
• Ciena Mcp: up to and including 8.0
• Ciena Navigator Ncs: version 8.1 only
• Ciena Planner Plus Onprem: up to and including 4.1

Published 2026-07-14. Last modified 2026-07-15.