{"id":"CVE-2026-9831","state":"PUBLISHED","title":"ExtremeCloud IQ Cross Tenant Data Exposure via Extreme Platform One Authentication Race Condition","description":"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.","publishedAt":"2026-05-29T21:19:17.118Z","updatedAt":"2026-06-01T13:53:05.140Z","severity":{"score":6.3,"label":"Medium","version":"3.1","vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:N/A:N","source":"ExtremeNetworks"},"assigner":"ExtremeNetworks","products":["Extreme Networks Extreme Platform ONE"],"affected":[{"vendor":"Extreme Networks","product":"Extreme Platform ONE","defaultStatus":"unaffected","versions":[{"version":"0","status":"affected","lessThan":"25.10.0-104","versionType":"custom"},{"version":"25.10.0-104","status":"unaffected","versionType":"custom"}],"platforms":["SaaS (Cloud Hosted)"]}],"references":["https://community.extremenetworks.com/t5/security-advisories-formerly/sa-2026-048-extremecloud-iq-cross-tenant-data-exposure-via/ba-p/121851"],"weaknesses":["CWE-362","CWE-488"],"ingestedAt":"2026-10-29T20:13:52.441Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/9xxx/CVE-2026-9831.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-9831","state":"PUBLISHED","datePublished":"2026-05-29T21:19:17.118Z","dateUpdated":"2026-06-01T13:53:05.140Z","assignerShortName":"ExtremeNetworks","assignerOrgId":"1c053176-eef3-4d6a-ae0b-24728c86587b","dateReserved":"2026-05-28T12:21:45.520Z"},"containers":{"cna":{"title":"ExtremeCloud IQ Cross Tenant Data Exposure via Extreme Platform One Authentication Race Condition","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."}],"affected":[{"vendor":"Extreme Networks","product":"Extreme Platform ONE","defaultStatus":"unaffected","versions":[{"version":"0","status":"affected","lessThan":"25.10.0-104","versionType":"custom"},{"version":"25.10.0-104","status":"unaffected","versionType":"custom"}],"platforms":["SaaS (Cloud Hosted)"]}],"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"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-362","lang":"en","description":"CWE-362: Concurrent Execution using Shared Resource with Improper Synchronization (Race Condition)","type":"CWE"}]},{"descriptions":[{"cweId":"CWE-488","lang":"en","description":"CWE-488 Exposure of data element to wrong session","type":"CWE"}]}],"providerMetadata":{"shortName":"ExtremeNetworks","orgId":"1c053176-eef3-4d6a-ae0b-24728c86587b","dateUpdated":"2026-05-29T21:19:17.118Z"},"datePublic":"2026-05-29T21:09:00.000Z","impacts":[{"capecId":"CAPEC-74","descriptions":[{"lang":"en","value":"CAPEC-74: Manipulating State"}]}],"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"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-06-01T13:52:52.575235Z","id":"CVE-2026-9831","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-06-01T13:53:05.140Z"}}]}}}