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Description

Deserialization of untrusted data in Azure Core shared client library for Python allows an authorized attacker to execute code over a network.

PUBLISHED Reserved 2025-12-11 | Published 2026-01-13 | Updated 2026-01-20 | Assigner microsoft




HIGH: 7.5CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C

Problem types

CWE-502: Deserialization of Untrusted Data

Product status

1.1.0 (custom) before 1.38.0
affected

References

msrc.microsoft.com/update-guide/vulnerability/CVE-2026-21226 (Azure Core shared client library for Python Remote Code Execution Vulnerability) vendor-advisory patch

cve.org (CVE-2026-21226)

nvd.nist.gov (CVE-2026-21226)

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