CVE-2026-9831

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

State: Published
Severity: 6.3 Medium
Published: May 29, 2026
Updated: Jun 1, 2026
Reserved: May 28, 2026

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.

Scores

CVSS	Score	Vector	Source
3.1	6.3 Medium	CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:N/A:N	ExtremeNetworks

Weaknesses

CWE-362 Concurrent Execution using Shared Resource with Improper Synchronization (Race Condition)
CWE-488 Exposure of data element to wrong session

Affected Products

Product	Versions
Extreme Platform ONEExtreme Networks	before 25.10.0-104Affected 25.10.0-104Not affected

References

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

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