CVE-2026-21226: Azure Core shared client library for Python Remote Code Execution Vulnerability

Analyzed

AliasesSUSE-SU-2026:0476-1SUSE-SU-2026:20617-1SUSE-SU-2026:20621-1+45 more

Published 13-01-2026Last modified 30-07-2026

Vulnerability summary

CVE-2026-21226 is a high (CVSS 7.5) Deserialization of Untrusted Data vulnerability in microsoft azure_core_shared_client_library. EPSS estimates a 0.95% chance of exploitation in the next 30 days, higher than 61.2% of scored vulnerabilities.

Priority

Routine

Not severe (CVSS 7.5, network access); no exploitation reported by the 5 checked sources

Source freshness unavailable

How is this decided?

CVSS score

7.5/10

010

High · v3.1 (CVE.org)

EPSS score

0.95%

0%100%

Low · +0.02 pp in 30 days

KEVNot listedNot listed by any tracked catalog.

RansomwareNot flaggedNo ransomware use recorded.

Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 1 · Related 2

SUSE-RU-2026:2237-1 CGA-X32R-7X98-26W5

Timeline

13-01-2026
PublishedVulnerability first disclosed.
30-07-2026
Last modifiedVulnerability information updated.

Description

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

CVSS metrics

5 scores · 5 sources · 1 version

v3.17.5

EPSS trend

Probability

0.95%

Chance of exploitation in the next 30 days

Percentile

61%

Versus all other CVEs

30-day change

Increase +0.02 pp

From 0.93% on 04-10-2026

04-10-202603-11-2026

Known exploited

Compare KEV catalogs

CISA KEV

Not in the CISA KEV catalog.

ENISA CNW

Not in the ENISA CNW catalog.

CIRCL

Not in the CIRCL catalog.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

CWE-502Deserialization of Untrusted DataThe product deserializes untrusted data without sufficiently ensuring that the resulting data will be valid.

Affected systems

Version check

Known conditions: network-reachable, low-privilege account, no user interaction (CVSS vector). Other conditions: not stated in public data.

Chainguard21 products

airflow-2< 2.11.0-r21
airflow-3< 3.1.5-r4
authentik< 2025.10.3-r5
authentik-fips< 2025.10.3-r2
awx< 24.6.1-r25

Show all 21

Wolfi8 products

airflow-3< 3.1.5-r4
az< 2.82.0-r1
datadog-agent-7.72-core-integrationsAll versions (No fix recorded)
datadog-agent-7.73-core-integrations< 7.73.3-r23
datadog-agent-7.74-core-integrations< 7.74.1-r24

Show all 8

Suse6 products

python-azure-core&distro=SUSE Linux Enterprise High Availability Extension 16.0< 1.32.0-160000.3.1
python-azure-core&distro=SUSE Linux Enterprise Module for Public Cloud 15 SP4< 1.30.0-150400.11.6.1
python-azure-core&distro=SUSE Linux Enterprise Module for Public Cloud 15 SP5< 1.30.0-150400.11.6.1
python-azure-core&distro=SUSE Linux Enterprise Module for Public Cloud 15 SP6< 1.30.0-150400.11.6.1
python-azure-core&distro=SUSE Linux Enterprise Module for Public Cloud 15 SP7< 1.30.0-150400.11.6.1