VDB
CVE-2026-21226
CVE-2026-21226
PUBLISHED
CVSS 7.5 HIGH
Azure Core shared client library for Python Remote Code Execution Vulnerability
Reported by microsoft · Published January 13, 2026
azure-core is fixed in 1.38.0 (Azure Registry)
Deserialization of untrusted data in Azure Core shared client library for Python allows an authorized attacker to execute code over a network.
Fixed versions
Upgrade to a fixed version or later. Language registries are listed first, then Linux distributions, then vendor products.
| Package | Ecosystem | Fixed in |
|---|---|---|
| azure-core | Azure Registry | 1.38.0 |
| az | Wolfi | 2.82.0-r1 |
| py3-cassandra-medusa | Chainguard | 0.27.0-r2 |
| barman | Chainguard | 3.17.0-r1 |
| awx | Chainguard | 24.6.1-r25 |
| pgadmin4 | Chainguard | 9.11-r2 |
| duplicity | Chainguard | 3.0.7-r2 |
| az | Chainguard | 2.82.0-r1 |
| datadog-agent-7.73 | Chainguard | 7.73.3-r23 |
| kserve | Wolfi | 0.16.0-r9 |
| open-webui | Chainguard | 0.7.2-r1 |
| datadog-agent-fips-7.73 | Chainguard | 7.73.3-r26 |
6 more packages have a fixed version. See every fix in Lookup.
Risk scores
CVSS 3.1
7.5
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Affected products
| Vendor | Product | Versions |
|---|---|---|
| Microsoft | Azure Core shared client library for Python | 1.1.0 |
| microsoft | azure_core_shared_client_library_for_python | 1.1.0 |
| Microsoft | Azure Core shared client library for Python | 1.1.0 |
Timeline
- Jan 13, 2026 CVE Published
- Jan 13, 2026 PoC Published (7 in total, the first dated here)
- Jan 14, 2026 EPSS Score (30 in total, the first dated here)
- Mar 10, 2026 Security Advisory (7 in total, the first dated here)
- Mar 25, 2026 Coalition ESS Score (2 in total, the first dated here)
- Jun 17, 2026 CVE Updated
Query this with the API
The same record, from the CLI:
vulnetix vdb vuln CVE-2026-21226
vulnetix vdb fixes CVE-2026-21226Or with curl, using the org id and key from your account page:
curl -s -H "Authorization: ApiKey ${VULNETIX_ORG_ID}:${VULNETIX_API_KEY}" \
"https://api.vdb.vulnetix.com/v2/vuln/CVE-2026-21226/fixes/registry"The Community plan is free and allows 50 queries a day. Get a free API key · API quickstart
References
- Azure Core shared client library for Python Remote Code Execution Vulnerability vendor-advisorypatch