{"cve":{"cve_id":"CVE-2024-21643","is_kev":false,"kev_date_added":null,"kev_vendor_project":null,"kev_product":null,"kev_vulnerability_name":null,"kev_short_description":null,"kev_required_action":null,"kev_due_date":null,"kev_known_ransomware":null,"kev_notes":null,"kev_cwes":null,"epss_score":0.02214,"epss_percentile":0.80322,"epss_as_of":"2026-06-23","description":"IdentityModel Extensions for .NET provide assemblies for web developers that wish to use federated identity providers for establishing the caller's identity. Anyone leveraging the `SignedHttpRequest`protocol or the `SignedHttpRequestValidator`is vulnerable. Microsoft.IdentityModel trusts the `jku`claim by default for the `SignedHttpRequest`protocol. This raises the possibility to make any remote or local `HTTP GET` request. The vulnerability has been fixed in Microsoft.IdentityModel.Protocols.SignedHttpRequest. Users should update all their Microsoft.IdentityModel versions to 7.1.2 (for 7x) or higher, 6.34.0 (for 6x) or higher.","published_at":"2024-01-10T04:13:16.959000Z","last_modified_at":null,"cvss_v3_score":7.1,"cvss_v3_vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:L","cvss_v3_severity":"HIGH","cvss_v4_score":null,"cvss_v4_vector":null,"cvss_v4_severity":null,"ssvc_decision":null,"ssvc_exploitation":"none","ssvc_automatable":false,"ssvc_technical_impact":"total","cwes":["CWE-94"],"nvd_references":["https://github.com/AzureAD/azure-activedirectory-identitymodel-extensions-for-dotnet/security/advisories/GHSA-rv9j-c866-gp5h","https://github.com/AzureAD/azure-activedirectory-identitymodel-extensions-for-dotnet/releases/tag/6.34.0","https://github.com/AzureAD/azure-activedirectory-identitymodel-extensions-for-dotnet/releases/tag/7.1.2","https://github.com/AzureAD/azure-activedirectory-identitymodel-extensions-for-dotnet/wiki/jkucve"],"vuln_status":null,"trending_score":null,"is_trending":false,"has_trended":false,"trended_number_one":false,"trending_peak_score":null,"trending_peak_rank":null,"started_trending_at":null,"trended_number_one_at":null,"summary_generated":null,"summary_generated_at":null,"summary_model":null,"created_at":"2026-06-24T00:09:39.878444Z","updated_at":"2026-06-29T01:52:20.328657Z"},"effective_severity":"HIGH","badges":[],"impact_analysis":[],"cvss_v3_decoded":{"version":"3.1","metrics":[{"metric":"AV","name":"Attack Vector","value":"N","value_label":"Network"},{"metric":"AC","name":"Attack Complexity","value":"H","value_label":"High"},{"metric":"PR","name":"Privileges Required","value":"L","value_label":"Low"},{"metric":"UI","name":"User Interaction","value":"N","value_label":"None"},{"metric":"S","name":"Scope","value":"U","value_label":"Unchanged"},{"metric":"C","name":"Confidentiality","value":"H","value_label":"High"},{"metric":"I","name":"Integrity","value":"H","value_label":"High"},{"metric":"A","name":"Availability","value":"L","value_label":"Low"}]},"cvss_v4_decoded":{"version":null,"metrics":[]},"affected":[{"vendor_slug":"azuread","vendor_name":"AzureAD","product_slug":"azure-activedirectory-identitymodel-extensions-for-dotnet","product_name":"azure-activedirectory-identitymodel-extensions-for-dotnet","version_start":"< 6.34.0","version_start_inclusive":true,"version_end":"< 6.34.0","version_end_inclusive":true,"cpe23_uri":"cve5:azuread:azure-activedirectory-identitymodel-extensions-for-dotnet:< 6.34.0:< 6.34.0"},{"vendor_slug":"azuread","vendor_name":"AzureAD","product_slug":"azure-activedirectory-identitymodel-extensions-for-dotnet","product_name":"azure-activedirectory-identitymodel-extensions-for-dotnet","version_start":">= 7.0.0-preview, < 7.1.2","version_start_inclusive":true,"version_end":">= 7.0.0-preview, < 7.1.2","version_end_inclusive":true,"cpe23_uri":"cve5:azuread:azure-activedirectory-identitymodel-extensions-for-dotnet:>= 7.0.0-preview, < 7.1.2:>= 7.0.0-preview, < 7.1.2"}],"exploit_refs":[],"news":[],"references":[{"url":"https://github.com/AzureAD/azure-activedirectory-identitymodel-extensions-for-dotnet/security/advisories/GHSA-rv9j-c866-gp5h","source_type":"VENDOR_ADVISORY","tags":["advisory"]},{"url":"https://github.com/AzureAD/azure-activedirectory-identitymodel-extensions-for-dotnet/releases/tag/6.34.0","source_type":"PATCH","tags":["patch"]},{"url":"https://github.com/AzureAD/azure-activedirectory-identitymodel-extensions-for-dotnet/releases/tag/7.1.2","source_type":"PATCH","tags":["patch"]},{"url":"https://github.com/AzureAD/azure-activedirectory-identitymodel-extensions-for-dotnet/wiki/jkucve","source_type":"MISC","tags":[]}],"timeline":[{"type":"published","at":"2024-01-10T04:13:16.959000Z","label":"CVE published","source":null},{"type":"cvss_changed","at":"2026-06-28T17:33:49.133192Z","label":"CVSS score revised","source":"cvelistv5"},{"type":"cvss_changed","at":"2026-06-28T17:33:49.133192Z","label":"CVSS score revised","source":"cvelistv5"},{"type":"cvss_changed","at":"2026-06-28T17:33:49.133192Z","label":"CVSS score revised","source":"cvelistv5"},{"type":"ssvc_changed","at":"2026-06-29T01:52:20.328657Z","label":"SSVC decision revised","source":"vulnrichment"},{"type":"ssvc_changed","at":"2026-06-29T01:52:20.328657Z","label":"SSVC decision revised","source":"vulnrichment"},{"type":"ssvc_changed","at":"2026-06-29T01:52:20.328657Z","label":"SSVC decision revised","source":"vulnrichment"}]}