{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-9831", "assignerOrgId": "1c053176-eef3-4d6a-ae0b-24728c86587b", "state": "PUBLISHED", "assignerShortName": "ExtremeNetworks", "dateReserved": "2026-05-28T12:21:45.520Z", "datePublished": "2026-05-29T21:19:17.118Z", "dateUpdated": "2026-05-29T21:19:17.118Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "1c053176-eef3-4d6a-ae0b-24728c86587b", "shortName": "ExtremeNetworks", "dateUpdated": "2026-05-29T21:19:17.118Z"}, "title": "ExtremeCloud IQ Cross Tenant Data Exposure via Extreme Platform One Authentication Race Condition", "datePublic": "2026-05-29T21:09:00.000Z", "problemTypes": [{"descriptions": [{"lang": "en", "cweId": "CWE-362", "description": "CWE-362: Concurrent Execution using Shared Resource with Improper Synchronization (Race Condition)", "type": "CWE"}]}, {"descriptions": [{"lang": "en", "cweId": "CWE-488", "description": "CWE-488 Exposure of data element to wrong session", "type": "CWE"}]}], "impacts": [{"capecId": "CAPEC-74", "descriptions": [{"lang": "en", "value": "CAPEC-74: Manipulating State"}]}], "affected": [{"vendor": "Extreme Networks", "product": "Extreme Platform ONE", "platforms": ["SaaS (Cloud Hosted)"], "versions": [{"status": "affected", "version": "0", "lessThan": "25.10.0-104", "versionType": "custom"}, {"status": "unaffected", "version": "25.10.0-104", "versionType": "custom"}], "defaultStatus": "unaffected"}], "descriptions": [{"lang": "en", "value": "A race condition in the shared Extreme Platform\nONE IAM Gateway API-key authentication path could, under specific\nhigh-concurrency traffic conditions, intermittently allow requests\nauthenticated with an Extreme Platform ONE /IAM-issued API key to receive\nresponse data for another tenant. The issue was observed through ExtremeCloud\nIQ/XIQ API endpoints and validated against both XIQ/XAPI and Extreme Platform ONE\n/Common Services API paths. XIQ-native tokens and standard OAuth/Bearer JWT\nauthentication were not affected.", "supportingMedia": [{"type": "text/html", "base64": false, "value": "A race condition in the shared Extreme Platform\nONE IAM Gateway API-key authentication path could, under specific\nhigh-concurrency traffic conditions, intermittently allow requests\nauthenticated with an Extreme Platform ONE /IAM-issued API key to receive\nresponse data for another tenant. The issue was observed through ExtremeCloud\nIQ/XIQ API endpoints and validated against both XIQ/XAPI and Extreme Platform ONE\n/Common Services API paths. XIQ-native tokens and standard OAuth/Bearer JWT\nauthentication were not affected."}]}], "references": [{"url": "https://community.extremenetworks.com/t5/security-advisories-formerly/sa-2026-048-extremecloud-iq-cross-tenant-data-exposure-via/ba-p/121851", "tags": ["vendor-advisory"]}], "metrics": [{"format": "CVSS", "scenarios": [{"lang": "en", "value": "GENERAL"}], "cvssV3_1": {"version": "3.1", "attackVector": "NETWORK", "attackComplexity": "HIGH", "privilegesRequired": "LOW", "userInteraction": "NONE", "scope": "CHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "NONE", "availabilityImpact": "NONE", "baseSeverity": "MEDIUM", "baseScore": 6.3, "vectorString": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:N/A:N"}}], "credits": [{"lang": "en", "value": "Sebastian Koller of Iteas IT Services GmbH (Austria) for responsible discovery and disclosure of this vulnerability.", "type": "finder"}, {"lang": "en", "value": "Sebastian Koller of Iteas IT Services GmbH (Austria) for responsible coordination and providing detailed evidence supporting root cause identification.", "type": "reporter"}], "source": {"advisory": "SA-2026-048", "discovery": "EXTERNAL"}, "x_generator": {"engine": "Vulnogram 1.0.2"}}}}

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{"cveTags": [], "descriptions": [{"lang": "en", "value": "A race condition in the shared Extreme Platform\nONE IAM Gateway API-key authentication path could, under specific\nhigh-concurrency traffic conditions, intermittently allow requests\nauthenticated with an Extreme Platform ONE /IAM-issued API key to receive\nresponse data for another tenant. The issue was observed through ExtremeCloud\nIQ/XIQ API endpoints and validated against both XIQ/XAPI and Extreme Platform ONE\n/Common Services API paths. XIQ-native tokens and standard OAuth/Bearer JWT\nauthentication were not affected."}], "id": "CVE-2026-9831", "lastModified": "2026-05-29T22:16:23.980", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "HIGH", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 6.3, "baseSeverity": "MEDIUM", "confidentialityImpact": "HIGH", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "CHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:N/A:N", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 4.0, "source": "1c053176-eef3-4d6a-ae0b-24728c86587b", "type": "Secondary"}]}, "published": "2026-05-29T22:16:23.980", "references": [{"source": "1c053176-eef3-4d6a-ae0b-24728c86587b", "url": "https://community.extremenetworks.com/t5/security-advisories-formerly/sa-2026-048-extremecloud-iq-cross-tenant-data-exposure-via/ba-p/121851"}], "sourceIdentifier": "1c053176-eef3-4d6a-ae0b-24728c86587b", "vulnStatus": "Received", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-362"}, {"lang": "en", "value": "CWE-488"}], "source": "1c053176-eef3-4d6a-ae0b-24728c86587b", "type": "Secondary"}]}

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