CVE-2026-9831 MEDIUM

CVE-2026-9831: ExtremeCloud IQ Cross Tenant Data Exposure via Extreme Platform One Authentication Race Condition

Vendor Extreme Networks
Product Extreme Platform ONE
Weakness CWE-362
Published May 29, 2026
Last update June 1, 2026
View on NVD All CVEs

CVSS base score

6.3/10
Attack vector Network
Attack complexity High
Privileges required Low
User interaction None
Confidentiality High
Integrity None

CVSS vector

CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:N/A:N

What the vulnerability does

01Description

A race condition in the shared Extreme Platform ONE IAM Gateway API-key authentication path could, under specific high-concurrency traffic conditions, intermittently allow requests authenticated with an Extreme Platform ONE /IAM-issued API key to receive response data for another tenant. The issue was observed through ExtremeCloud IQ/XIQ API endpoints and validated against both XIQ/XAPI and Extreme Platform ONE /Common Services API paths. XIQ-native tokens and standard OAuth/Bearer JWT authentication were not affected.

Key dates

02Disclosure timeline

May 29, 2026 CVE published
June 1, 2026 Record updated