CVE-2026-21531
Azure AI Language Authoring Elevation of Privilege Vulnerability can Lead to RCE
9.8
CRITICAL
CVSS 3.1
EPSS 0.48%
Description
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.
How to fix CVE-2026-21531
To remediate CVE-2026-21531, upgrade the affected package to a fixed version below.
- PyPI/azure-ai-language-conversations-authoring—upgrade to 1.0.0b4 or later
Is CVE-2026-21531 being exploited?
Low — EPSS is 0.5%, meaning exploitation activity has not been observed at scale.
Affected packages (1)
- from 0, < 1.0.0b4
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | CRITICAL9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |