{"id":"CVE-2026-21226","aliases":["GHSA-jm66-cg57-jjv5","PYSEC-2026-1208"],"url":"https://o3.security/vulnerability/CVE-2026-21226","summary":"Azure Core is vulnerable to deserialization of untrusted data","details":"Deserialization of untrusted data in Azure Core shared client library for Python allows an authorized attacker to execute code over a network.","published":"2026-01-13T19:16:23.987Z","modified":"2026-07-10T21:02:05.636858Z","cvss":{"score":7.5,"severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H"},"epss":null,"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"PyPI","name":"azure-core","fixedVersion":"1.38.0"}],"fix":null,"references":[{"type":"ADVISORY","url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-21226"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-21226"},{"type":"PACKAGE","url":"https://github.com/Azure/azure-sdk-for-python"},{"type":"WEB","url":"https://github.com/Azure/azure-sdk-for-python/blob/6d2e6431ea0991861640e449e51e894247a7771a/sdk/core/azure-core/CHANGELOG.md#1380-2026-01-12"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-07-10T21:02:05.636858Z"}}