{"cve":"CVE-2026-21226","nvd":{"published":"2026-01-13T19:16:23.987","modified":"2026-06-17T10:18:18.667","status":"Analyzed","description":"Deserialization of untrusted data in Azure Core shared client library for Python allows an authorized attacker to execute code over a network.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H","score":7.5},"cwes":["CWE-502"],"references":["https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-21226"],"products":["microsoft:azure_core_shared_client_library"],"source":"nvd","synced_at":"2026-10-19T22:19:41.481987139+00:00"},"epss":{"cve":"CVE-2026-21226","score":0.0095,"percentile":0.61259,"date":"2026-11-01"},"kev":null,"osv":[{"id":"GHSA-jm66-cg57-jjv5","url":"https://osv.dev/vulnerability/GHSA-jm66-cg57-jjv5","summary":"Azure Core is vulnerable to deserialization of untrusted data","modified":"2026-09-10T03:50:33.330380695Z","packages":[{"ecosystem":"PyPI","name":"azure-core","purl":"pkg:pypi/azure-core","ranges":["<1.38.0"],"fixed":["1.38.0"]}]},{"id":"PYSEC-2026-1208","url":"https://osv.dev/vulnerability/PYSEC-2026-1208","summary":"Azure Core is vulnerable to deserialization of untrusted data","modified":"2026-07-07T17:47:32.613512309Z","packages":[{"ecosystem":"PyPI","name":"azure-core","purl":"pkg:pypi/azure-core","ranges":["<1.38.0"],"fixed":["1.38.0"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}