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CVE-2026-84731: Acropolis Operating System (AOS)

Severity

9.3 (CRITICAL)

Vendor

NUTANIX

Affected versions

0 through before 7.3.1.18; 7.5 through before 7.5.2; 7.6 through before 7.6.0.8

Fixed version

7.3.1.18

Patch status

Patched

Published

2026-10-15T18:17:29.960

Modified

2026-10-15T18:17:29.960

Why it matters

This matters because the issue affects identity or token handling. Successful exploitation could allow unauthorized authentication, client manipulation, or access to protected services.

Recommended admin actions

• Prioritize validation immediately due to critical CVSS severity.
• Treat internet-facing systems as higher priority.

Technical summary

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.

View the official NVD record for CVE-2026-84731

CVE data is sourced from NVD/CNA records and optional enrichment. Validate against the vendor advisory before taking production action.