# CVE-2026-9831

## Summary

- **CVE ID:** CVE-2026-9831
- **Severity:** MEDIUM
- **CVSS Score:** 6.3 (CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:N/A:N)
- **CWE:** CWE-362, CWE-488
- **Published:** May 29, 2026
- **Last Modified:** Jun 1, 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.

## Affected Products

- Extreme Networks — Extreme Platform ONE (0)
- Extreme Networks — Extreme Platform ONE (25.10.0-104)

## References

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

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.17%
- **EPSS Percentile:** 6.8

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-11._