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

CVE ID :CVE-2026-9831

Published : May 29, 2026, 10:16 p.m. | 16 minutes ago

Description :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.

Severity: 6.3 | MEDIUM

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