CVE-2026-9831

Published: May 29, 2026

Modified: Jun 1, 2026

PUBLISHED

CVSS v3.1

6.3

MEDIUM

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.

Vendor	Product	Versions
Extreme Networks	Extreme Platform ONE	affected `0 - < 25.10.0-104` unaffected `25.10.0-104`

Weaknesses (CWE)

CWE-362

CWE-488

CVSS v3.1 Details

CVSS v3.1 Vector

CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:N/A:N

Attack Vector

Network

Attack Complexity

High

Privileges Required

Low

User Interaction

None

Scope

Changed

Confidentiality

High

Integrity

None

Availability

None

References

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

vendor-advisory

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CVE-2026-9831

Description

Affected Products

Weaknesses (CWE)

CVSS v3.1 Details

References