Auth bypass in Nutanix Acropolis Operating System (Aos)
CVE-2026-84731
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Affected products
Weakness classification (CWE)
References
- 2ffdacf6-8681-47df-b023-4f11abd61c1d (vendor-advisory)
- 2ffdacf6-8681-47df-b023-4f11abd61c1d (release-notes)
- 2ffdacf6-8681-47df-b023-4f11abd61c1d (x_support)
Frequently asked questions
- What is CVE-2026-84731?
- CVE-2026-84731 is a critical-severity vulnerability in Nutanix Acropolis Operating System (Aos), classified under Authentication Bypass by Spoofing. CVSS score: 9.8/10. Published 2026-10-15.
- How severe is CVE-2026-84731?
- Critical severity. CVSS v3 base score is 9.8 out of 10.