Nutanix Acropolis Operating System up to 7.5.1 Authentication Filters improper authorization

Summaryinfo

A vulnerability, which was classified as very critical, was found in Nutanix Acropolis Operating System up to 7.5.1. This affects an unknown function of the component Authentication Filters. Such manipulation leads to improper authorization. This vulnerability is listed as CVE-2026-84731. The attack may be performed from remote. There is no available exploit. You should upgrade the affected component.

Detailsinfo

A vulnerability was found in Nutanix Acropolis Operating System up to 7.5.1. It has been rated as very critical. Affected by this issue is some unknown functionality of the component Authentication Filters. The manipulation with an unknown input leads to a improper authorization vulnerability. Using CWE to declare the problem leads to CWE-285. The product does not perform or incorrectly performs an authorization check when an actor attempts to access a resource or perform an action. Impacted is confidentiality, integrity, and availability. CVE summarizes:

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.

The advisory is available at download.nutanix.com. This vulnerability is handled as CVE-2026-84731 since 09/02/2026. The exploitation is known to be easy. The attack may be launched remotely. No form of authentication is required for exploitation. The technical details are unknown and an exploit is not available. The structure of the vulnerability defines a possible price range of USD $0-$5k at the moment (estimation calculated on 10/15/2026). This vulnerability is assigned to T1548.002 by the MITRE ATT&CK project.

It is declared as proof-of-concept.

Upgrading to version 7.3.1.18, 7.5.2 or 7.6.0.8 eliminates this vulnerability.

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Productinfo

Vendor

• Nutanix

Name

• Acropolis Operating System

Version

• 7.5.0
• 7.5.1

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CPE 2.2info

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