High severity8.8NVD Advisory· Published Aug 14, 2019· Updated Jun 17, 2026
CVE-2019-1258
CVE-2019-1258
Description
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. The authenticated attacker can exploit this vulneraiblity by accessing a service configured for On-Behalf-Of flow that assigns incorrect tokens. This security update addresses the vulnerability by removing fallback cache look-up for On-Behalf-Of scenarios.
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LLM-synthesized narrative grounded in this CVE's description and references.
Affected packages
Versions sourced from the GitHub Security Advisory.
| Package | Affected versions | Patched versions |
|---|---|---|
microsoft.identitymodel.clients.activedirectoryNuGet | >= 5.0.0, < 5.2.0 | 5.2.0 |
Affected products
3- Microsoft/ADAL.NETv5cpe:2.3:a:microsoft:active_directory_authentication_library:*:*:*:*:*:.net:*:*Range: 5.0.0
- Microsoft/Nuget 5.2.0v5cpe:2.3:a:microsoft:nuget:5.2.0:*:*:*:*:*:*:*Range: 5.0.0
Patches
Vulnerability mechanics
References
3- portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2019-1258nvdPatchVendor AdvisoryWEB
- github.com/advisories/GHSA-xc6x-cq47-9chwghsaADVISORY
- nvd.nist.gov/vuln/detail/CVE-2019-1258ghsaADVISORY
News mentions
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