CVE-2026-9831
ExtremeCloud IQ Cross Tenant Data Exposure via Extreme Platform One Authentication Race Condition
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.
INFO
Published Date :
May 29, 2026, 10:16 p.m.
Last Modified :
May 29, 2026, 10:16 p.m.
Remotely Exploit :
Yes !
Source :
1c053176-eef3-4d6a-ae0b-24728c86587b
Affected Products
The following products are affected by CVE-2026-9831
vulnerability.
Even if cvefeed.io is aware of the exact versions of the
products
that
are
affected, the information is not represented in the table below.
No affected product recoded yet
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | MEDIUM | 1c053176-eef3-4d6a-ae0b-24728c86587b | ||||
| CVSS 3.1 | MEDIUM | MITRE-CVE |
Solution
- Update the Extreme Platform ONE IAM Gateway software.
- Test API key authentication under high concurrency.
- Monitor API access logs for anomalies.
- Restrict API key usage where possible.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-9831.
| URL | Resource |
|---|---|
| https://community.extremenetworks.com/t5/security-advisories-formerly/sa-2026-048-extremecloud-iq-cross-tenant-data-exposure-via/ba-p/121851 |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-9831 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-9831
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-9831 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-9831 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
New CVE Received by 1c053176-eef3-4d6a-ae0b-24728c86587b
May. 29, 2026
Action Type Old Value New Value 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. Added CVSS V3.1 AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:N/A:N Added CWE CWE-362 Added CWE CWE-488 Added Reference https://community.extremenetworks.com/t5/security-advisories-formerly/sa-2026-048-extremecloud-iq-cross-tenant-data-exposure-via/ba-p/121851