{"id":"CVE-2026-21226","aliases":["GHSA-jm66-cg57-jjv5","PYSEC-2026-1208"],"title":"Azure Core is vulnerable to deserialization of untrusted data","summary":"Azure Core is vulnerable to deserialization of untrusted data","severity":"high","cvss":7.5,"cvssVector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H","vendor":"azure-core","product":"azure-core","ecosystem":"pip","affected":["azure-core < 1.38.0"],"patched":["azure-core 1.38.0"],"published":"2026-01-13","updated":"2026-09-10","sourceUpdated":"2026-09-10T03:50:33.330380695Z","source":"OSV","sourceUrl":"https://osv.dev/vulnerability/GHSA-jm66-cg57-jjv5","references":[{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-21226"},{"url":"https://github.com/Azure/azure-sdk-for-python"},{"url":"https://github.com/Azure/azure-sdk-for-python/blob/6d2e6431ea0991861640e449e51e894247a7771a/sdk/core/azure-core/CHANGELOG.md#1380-2026-01-12"},{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-21226"}],"tags":["osv","pip"],"epss":0.00929,"epssPercentile":0.59081,"ingestedAt":"2026-07-08T18:25:50.832Z","slug":"CVE-2026-21226","body":"## Overview\n\nDeserialization of untrusted data in Azure Core shared client library for Python allows an authorized attacker to execute code over a network.\n\n## Affected packages\n\n- `azure-core < 1.38.0`\n\n## Remediation\n\nUpgrade to a patched release:\n\n- `azure-core 1.38.0`","depth":"twilight","depthScore":41,"depthScoreParts":{"impact":41.3,"likelihood":0.2,"exploitation":0,"ransomware":0},"changes":[]}