What’s Vulnerable › Vulnerabilities
CVE-2026-9831: ExtremeCloud IQ Cross Tenant Data Exposure via Extreme Platform One Authentication Race Condition
- Severity: medium (CVSS 6.3 v3.1)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 0.2% probability of exploitation in the next 30 days
- Public exploit or detection template: none known
- Published: 2026-05-29 · updated 2026-07-22
- Weakness: CWE-362
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
- Extreme Networks Extreme Platform ONE: before 25.10.0-104 — fixed in 25.10.0-104
How to fix
Upgrade to a fixed version: Extreme Networks Extreme Platform ONE 25.10.0-104. Check the vendor advisory for mitigations.
References
Get alerted when CVE-2026-9831 or the next vulnerability affects your stack