Remote Code Execution Vulnerability in Azure Core Shared Client Library for Python
CVE-2026-21226

7.5HIGH

Key Information:

Vendor

Microsoft
Status
Azure Core Shared Client Library For Python
Vendor
CVE Published:
13 January 2026

What is CVE-2026-21226?

A vulnerability exists in the Azure Core shared client library for Python, which allows an authorized attacker to potentially execute arbitrary code over a network through the deserialization of untrusted data. This could lead to unauthorized actions and compromises in security, necessitating immediate attention to apply relevant patches and safeguard against such exploits.

Affected Version(s)

Azure Core shared client library for Python 1.1.0 < 1.38.0

References

https://msrc.microsoft.com/update-guide/vulnerability/CVE...
vendor-advisorypatch

CVSS V3.1

Score:
7.5
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
High
Privileges Required:
Low
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

JSON
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