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

Description (CNA)

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 (CNA)

Vendor / product	Versions
Extreme Networks / Extreme Platform ONE	affected 0 before 25.10.0-104; unaffected 25.10.0-104

CWE

CWE-362, CWE-488

References

https://community.extremenetworks.com/t5/security-advisories-formerly/sa-2026-048-extremecloud-iq-cross-tenant-data-exposure-via/ba-p/121851

ADP enrichment

CISA-ADP

No English description supplied.

No references supplied.