CVE-2026-9831: Extreme Networks Extreme Platform One

Medium severity, CVSS 6.3. EPSS: 0.3% chance of exploitation in the next 30 days.

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

• Extreme Networks Extreme Platform One: before 25.10.0-104 (fixed in 25.10.0-104)

Published 2026-05-29. Last modified 2026-07-22.