{"id":"CVE-2024-21643","aliases":["GHSA-rv9j-c866-gp5h"],"url":"https://o3.security/vulnerability/CVE-2024-21643","summary":"Microsoft.IdentityModel.Protocols.SignedHttpRequest remote code execution vulnerability","details":"### Impact\n_What kind of vulnerability is it? Who is impacted?_\nAnyone 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. \n\n### Patches\n_Has the problem been patched? What versions should users upgrade to?_\nThe 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, if using Microsoft.IdentityModel.Protocols.SignedHttpRequest.\n\n### Workarounds\n_Is there a way for users to fix or remediate the vulnerability without upgrading?_\nNo, users must upgrade.\n\n### References\n_Are there any links users can visit to find out more?_\nhttps://aka.ms/IdentityModel/Jan2024/jku","published":"2024-01-10T04:13:16.959Z","modified":"2026-08-12T03:51:21.473932079Z","cvss":{"score":7.1,"severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:L"},"epss":null,"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"NuGet","name":"Microsoft.IdentityModel.Protocols.SignedHttpRequest","fixedVersion":"6.34.0"},{"ecosystem":"NuGet","name":"Microsoft.IdentityModel.Protocols.SignedHttpRequest","fixedVersion":"7.1.2"}],"fix":null,"references":[{"type":"WEB","url":"https://github.com/AzureAD/azure-activedirectory-identitymodel-extensions-for-dotnet/releases/tag/6.34.0"},{"type":"WEB","url":"https://github.com/AzureAD/azure-activedirectory-identitymodel-extensions-for-dotnet/releases/tag/7.1.2"},{"type":"WEB","url":"https://github.com/AzureAD/azure-activedirectory-identitymodel-extensions-for-dotnet/wiki/jkucve"},{"type":"ADVISORY","url":"https://github.com/AzureAD/azure-activedirectory-identitymodel-extensions-for-dotnet/security/advisories/GHSA-rv9j-c866-gp5h"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/21xxx/CVE-2024-21643.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2024-21643"},{"type":"PACKAGE","url":"https://github.com/AzureAD/azure-activedirectory-identitymodel-extensions-for-dotnet"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-12T03:51:21.473932079Z"}}