Security advisory

{
  "id": "b40fc91ec78be5f33ace4428601aca28a522acdb516c13e0008b6e38c5253456",
  "url": "https://osv.dev/vulnerability/CVE-2019-1258",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2019-1258",
    "summary": "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.",
    "evidence": "osv:CVE-2019-1258",
    "products": [],
    "severity": "high",
    "structured": {
      "id": "CVE-2019-1258",
      "aliases": [
        "CVE-2019-1258",
        "GHSA-xc6x-cq47-9chw"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/azuread/azure-activedirectory-library-for-dotnet",
              "type": "GIT",
              "events": [
                {
                  "introduced": "99f1dd308ad4ad8aeb3ca90014e0f1c12e219490"
                },
                {
                  "fixed": "e548649d705daadfc1306f5c6db3b0e81d50b001"
                },
                {
                  "introduced": "df6c2ddacc27ecf726e64d6d4bedb05053250b90"
                },
                {
                  "last_affected": "d80b70dff7cdbc001b3e604019371daac80d9211"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:microsoft:active_directory_authentication_library:*:*:*:*:*:.net:*:*",
                    "range": [
                      {
                        "introduced": "5.0.5"
                      },
                      {
                        "fixed": "5.2.0"
                      }
                    ],
                    "source": "CPE_RANGE"
                  },
                  {
                    "cpe": "cpe:2.3:a:microsoft:active_directory_authentication_library:5.0.0:preview:*:*:*:.net:*:*",
                    "range": [
                      {
                        "introduced": "5.0.0-preview"
                      },
                      {
                        "last_affected": "5.0.0-preview"
                      }
                    ],
                    "source": "CPE_STRING"
                  },
                  {
                    "cpe": "cpe:2.3:a:microsoft:active_directory_authentication_library:5.0.1:preview:*:*:*:.net:*:*",
                    "range": [
                      {
                        "introduced": "5.0.1-preview"
                      },
                      {
                        "last_affected": "5.0.1-preview"
                      }
                    ],
                    "source": "CPE_STRING"
                  },
                  {
                    "cpe": "cpe:2.3:a:microsoft:active_directory_authentication_library:5.0.2:preview:*:*:*:.net:*:*",
                    "range": [
                      {
                        "introduced": "5.0.2-preview"
                      },
                      {
                        "last_affected": "5.0.2-preview"
                      }
                    ],
                    "source": "CPE_STRING"
                  },
                  {
                    "cpe": "cpe:2.3:a:microsoft:active_directory_authentication_library:5.0.3:preview:*:*:*:.net:*:*",
                    "range": [
                      {
                        "introduced": "5.0.3-preview"
                      },
                      {
                        "last_affected": "5.0.3-preview"
                      }
                    ],
                    "source": "CPE_STRING"
                  }
                ]
              }
            }
          ],
          "versions": [
            "5.0.0-preview",
            "5.0.1-preview",
            "5.0.2-preview",
            "5.0.3-preview",
            "5.1.1",
            "5.1.0",
            "5.0.5",
            "ADAL-v5.0.1-preview",
            "ADAL-v5.0.0-preview"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2019-1258.json"
          }
        }
      ],
      "modified": "2026-10-24T10:30:42.470088068Z",
      "provider": "osv",
      "references": [
        "https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2019-1258"
      ],
      "provider_metadata": {
        "unresolved_ranges": [
          {
            "cpes": [
              "cpe:2.3:a:microsoft:nuget:5.2.0:*:*:*:*:*:*:*"
            ],
            "vendor_product": "microsoft:nuget",
            "extracted_events": [
              {
                "range": [
                  {
                    "introduced": "5.2.0"
                  },
                  {
                    "last_affected": "5.2.0"
                  }
                ],
                "source": "CPE_STRING"
              }
            ]
          }
        ]
      }
    },
    "related_cves": [
      {
        "value": "CVE-2019-1258",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 435389,
  "published_at": "2019-08-14T21:15:19.173+00:00"
}