{"id":"CVE-2019-1258","details":"An elevation of privilege vulnerability exists in Azure Active Directory Authentication Library On-Behalf-Of flow, in the way the library caches tokens. This vulnerability allows an authenticated attacker to perform actions in context of another user.\nThe authenticated attacker can exploit this vulneraiblity by accessing a service configured for On-Behalf-Of flow that assigns incorrect tokens.\nThis security update addresses the vulnerability by removing fallback cache look-up for On-Behalf-Of scenarios.","aliases":["GHSA-xc6x-cq47-9chw"],"modified":"2026-02-22T08:21:23.870782Z","published":"2019-08-14T21:15:19.173Z","references":[{"type":"ADVISORY","url":"https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2019-1258"},{"type":"FIX","url":"https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2019-1258"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/azuread/azure-activedirectory-library-for-dotnet","events":[{"introduced":"99f1dd308ad4ad8aeb3ca90014e0f1c12e219490"},{"fixed":"e548649d705daadfc1306f5c6db3b0e81d50b001"}]}],"versions":["5.0.5","5.1.0","5.1.1"],"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2019-1258.json"}}],"schema_version":"1.7.3","severity":[{"type":"CVSS_V3","score":"CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"}]}