CVE-2026-84731

CVSS 9.8 (critical) · published 2026-10-15

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.

Weakness: CWE-290, CWE-302, CWE-306

Source: NVD CVE-2026-84731

References

• https://download.nutanix.com/alerts/Security_Advisory_0058.pdf
• https://portal.nutanix.com/page/documents/list?type=software&filterKey=software&filterVal=AOS
• https://www.nutanix.com/support

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