Vulnerability · Published Oct 15, 2026 · Assigned by Nutanix
CVE-2026-84731Pre-Authentication Admin Bypass and Remote Code Execution in Nutanix Prism Gateway inside AOS
Critical 9.8
In plain English
A critical-severity missing authentication in Acropolis Operating System (AOS) from Nutanix. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 1.3% (higher than 70% of all known vulnerabilities).
Official description
An unauthenticated remote attacker can bypass authentication and gain full access to administrative API endpoints in Nutanix Prism Element by including a crafted internal management HTTP header. The vulnerability is caused by a misconfiguration in the application's authentication filters. Consequently, the server responds with a Set-Cookie header containing a valid JSESSIONID. This session cookie decodes to a JSON Web Token (JWT) granting maximum cluster administrative privileges. Successful exploitation allows the attacker to execute root-level commands on all Controller VMs (CVMs) in the cluster, leading to complete cluster destruction and unauthorized access to VM memory and virtual disks.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Nutanix | Acropolis Operating System (AOS) | 0 – before 7.3.1.187.5 – before 7.5.27.6 – before 7.6.0.8 |
Weakness: CWE-306, CWE-290, CWE-302 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H