CVE-2026-9831CWE-362CWE-488

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

Medium · published May 29, 2026

CVSS v3.1
6.3
EPSS
0%
Percentile
16.5
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
6.3 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:N/A:N
CVSS v4.0
Not supplied
EPSS
0.00257 · 16.5th percentile
Weaknesses
CWE-362 · Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition'); CWE-488 · Exposure of Data Element to Wrong Session
Published
2026-05-29T21:19Z
EPSS history
Timeline
  • 29 MAY 21:19Z
    ExtremeCloud IQ Cross Tenant Data Exposure via Extreme Platform One Authentication Race Condition
    cvelistv5