CVE-2026-21226
Azure Core is vulnerable to deserialization of untrusted data
7.5
HIGH
CVSS 3.1
EPSS 2.7%
Description
Deserialization of untrusted data in Azure Core shared client library for Python allows an authorized attacker to execute code over a network.
How to fix CVE-2026-21226
To remediate CVE-2026-21226, upgrade the affected package to a fixed version below.
- PyPI/azure-core—upgrade to 1.38.0 or later
Is CVE-2026-21226 being exploited?
Low — EPSS is 2.7%, meaning exploitation activity has not been observed at scale.
Affected packages (1)
- from 0, < 1.38.0
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | HIGH7.5 | CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H |