CVE-2026-9831
MediumCVSS 6.3Exploitation Probability (EPSS)
Low risk7th percentile - higher than 7% of all known CVEs
Summary
A race condition in the shared Extreme Platform ONE IAM Gateway API-key authentication path could, under high-concurrency traffic, intermittently allow requests authenticated with one tenant's 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.
Risk Assessment
The risk is potential cross-tenant data leakage, which could compromise customer data confidentiality and breach tenant isolation policies.
Recommendation
Immediately update Extreme Platform ONE to a patched version that fixes the race condition and implement monitoring of API traffic for anomalies.
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Original NVD description (English source)
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.
Vulnerability data from NVD (NIST) · CISA KEV · EPSS

