CVE-2026-9831

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

Published May 29, 2026 CVSS 3.1 · 6.3 Medium EPSS < 1% KEV · Not listed
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.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
First Time appeared Extreme Networks
Extreme Networks extreme Platform One
Vendors & Products Extreme Networks
Extreme Networks extreme Platform One
Type Values Removed Values Added
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.
Title ExtremeCloud IQ Cross Tenant Data Exposure via Extreme Platform One Authentication Race Condition
Weaknesses CWE-362
CWE-488
References
Metrics cvssV3_1

{'score': 6.3, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:N/A:N'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
ExtremeNetworks
Published
Updated
Jun 1, 2026, 1:53 PM
Reserved
May 28, 2026, 12:21 PM
Status
Awaiting Analysis
Published
May 29, 2026, 10:16 PM
Modified
Jul 22, 2026, 6:10 AM