SB2026060127 - Race condition in Extreme Platform ONE

Description

This security bulletin contains information about 1 vulnerability.

1) Race condition (CVE-ID: CVE-2026-9831)

CWE-ID: CWE-362 - Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')

CVSSv4: CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear

The vulnerability allows a remote user to disclose sensitive information across tenants.

The vulnerability exists due to a race condition in the shared Extreme Platform ONE IAM Gateway API-key authentication path when handling high-concurrency requests to affected API endpoints. A remote user can send concurrent requests authenticated with an IAM-issued API key to disclose sensitive information across tenants.

XIQ-native tokens and standard OAuth/Bearer JWT authentication are not affected.

Remediation

Install update from vendor's website.

References

• https://community.extremenetworks.com/t5/security-advisories-formerly/sa-2026-048-extremecloud-iq-cross-tenant-data-exposure-via/ba-p/121851
• https://extreme-networks.my.site.com/ExtrArticleDetail?an=000136573