CVE-2026-5270 Authentication Bypass in Navigator and Blue Planet Products
Unauthenticated attackers can bypass authentication and audit logging in Ciena Navigator and Blue Planet products by manipulating HTTP requests.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-5270?
CVE-2026-5270 is a critical authentication bypass vulnerability in Blue Planet Inventory, published on 14 Jul 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
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.
Weakness: CWE-287
Which versions are affected by CVE-2026-5270?
How do I fix CVE-2026-5270?
No fix has been published for CVE-2026-5270 yet. Limit exposure of the affected software until one is available.
Upgrade, and rotate credentials and sessions that may have been exposed. More about Authentication bypass.
Is CVE-2026-5270 being exploited?
There is no known exploitation of CVE-2026-5270 in the wild and no public exploit code.
Sources
Also known as GHSA-rp4h-q5qj-wrcr.