CVE-2026-21226

Azure Core shared client library for Python Remote Code Execution Vulnerability

Published Jan 13, 2026 CVSS 3.1 · 7.5 High EPSS < 1% KEV · Not listed
Description
Deserialization of untrusted data in Azure Core shared client library for Python allows an authorized attacker to execute code over a network.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

Source ID Title
Github GHSA Github GHSA GHSA-jm66-cg57-jjv5 Azure Core is vulnerable to deserialization of untrusted data
History
Type Values Removed Values Added
First Time appeared Microsoft azure Core Shared Client Library
CPEs cpe:2.3:a:microsoft:azure_sdk_for_python:*:*:*:*:*:*:*:* cpe:2.3:a:microsoft:azure_core_shared_client_library:*:*:*:*:*:python:*:*
Vendors & Products Microsoft azure Sdk For Python
Microsoft azure Core Shared Client Library
Type Values Removed Values Added
First Time appeared Microsoft azure Sdk For Python
CPEs cpe:2.3:a:microsoft:azure_sdk_for_python:*:*:*:*:*:*:*:*
Vendors & Products Microsoft azure Sdk For Python
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Type Values Removed Values Added
Description Deserialization of untrusted data in Azure Core shared client library for Python allows an authorized attacker to execute code over a network.
Title Azure Core shared client library for Python Remote Code Execution Vulnerability
First Time appeared Microsoft
Microsoft azure Core Shared Client Library For Python
Weaknesses CWE-502
CPEs cpe:2.3:a:microsoft:azure_core_shared_client_library_for_python:*:*:*:*:*:*:*:*
Vendors & Products Microsoft
Microsoft azure Core Shared Client Library For Python
References
Metrics cvssV3_1

{'score': 7.5, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
microsoft
Published
Updated
Jul 30, 2026, 8:47 PM
Reserved
Dec 11, 2025, 9:02 PM
Status
Analyzed
Published
Jan 13, 2026, 7:16 PM
Modified
Jun 17, 2026, 10:18 AM