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OpenAdvisories
Medium · 6.3 CVE-2026-9831 EUVD-2026-33445GHSA-w637-mwv9-mchj

ExtremeCloud IQ Cross Tenant Data Exposure via Extreme Platform One Authentication Race Condition

Published May 29, 2026 · Updated Jun 1, 2026 · Assigned by ExtremeNetworks

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.

Affected products

VendorProductAffectedFixed
Extreme Networks Extreme Platform ONE < 25.10.0-104 25.10.0-104

References