CVE-2026-21226

HIGH

Azure Core Shared Client Library for Python < 1.38.0 - Remote Code Execution via Untrusted Data Deserialization

Title source: llm
STIX 2.1

Description

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

References (1)

Core 1
Core References

Scores

CVSS v3 7.5
EPSS 0.0078
EPSS Percentile 50.9%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

CISA SSVC

Vulnrichment
Exploitation none
Automatable no
Technical Impact total

Details

CWE
CWE-502
Status published
Products (3)
Microsoft/Azure Core shared client library for Python 1.1.0 - 1.38.0
microsoft/azure_core_shared_client_library 1.1.0 - 1.38.0
pypi/azure-core 0 - 1.38.0PyPI
Published Jan 13, 2026
Tracked Since Feb 18, 2026