Auth bypass in Blue Planet Inventory
CVE-2026-5270
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.
Vulnerability class: Broken Authentication
Published · last modified .
CVSS v3 metric
CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.007 (50.8th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 51st percentile — 50.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.007 · newest: 0.007 · change: 0.000
Affected products
- Blue Planet Inventory — versions <=24.04.001, <=23.12.401, <=23.08.302
- Blue Planet Orchestration — versions <=24.04.2, <=23.12.3, <=23.08.4
- Blue Planet Route Optimization & Analysis — versions <=24.04.1.2-R, <=23.12.1.6-R, <=23.08.1.6-R
- Blue Planet Unified Assurance & Analytics — versions <=24.04 MR1, <=23.12 MR3, <=23.04. MR4
- Ciena Mcp — versions <= 8.0
- Ciena Navigator Ncs — versions 8.1
- Ciena Planner Plus Onprem — versions <= 4.1
Weakness classification (CWE)
References
Frequently asked questions
- What is CVE-2026-5270?
- CVE-2026-5270 is a critical-severity vulnerability in Blue Planet Inventory, classified under Improper Authentication. CVSS score: 9.8/10. Published 2026-07-14.
- How severe is CVE-2026-5270?
- Critical severity. CVSS v3 base score is 9.8 out of 10.