Azure AI Language Authoring Elevation of Privilege Vulnerability can Lead to RCE
Date: 2026-02
Affected: pip/azure-ai-language-conversations-authoring
Attack vector: deserialization
Category: vulnerability-disclosure
Severity: Critical
CVE: CVE-2026-21531
CWE: CWE-502
CVSS: 9.8 (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H)

Deserialization of untrusted data in the Azure AI Language Conversations Authoring client library for Python allows an unauthorized attacker to execute code over a network.


Mitigations:

Architectural layers (MAESTRO):