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PYSEC-2026-1208

Vulnerability from pysec - Published: 2026-07-07 16:03 - Updated: 2026-07-07 17:23
VLAI
Details

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

Severity
7.5 (High)
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
Impacted products
Name purl
azure-core pkg:pypi/azure-core
Aliases
To clipboard 

{
  "affected": [
    {
      "package": {
        "ecosystem": "PyPI",
        "name": "azure-core",
        "purl": "pkg:pypi/azure-core"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.38.0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.0.0",
        "1.0.0b1",
        "1.0.0b2",
        "1.0.0b3",
        "1.0.0b4",
        "1.1.0",
        "1.1.1",
        "1.10.0",
        "1.11.0",
        "1.12.0",
        "1.12.0b1",
        "1.13.0",
        "1.13.0b1",
        "1.14.0",
        "1.14.0b1",
        "1.15.0",
        "1.15.0b1",
        "1.16.0",
        "1.17.0",
        "1.18.0",
        "1.19.0",
        "1.19.1",
        "1.2.0",
        "1.2.1",
        "1.2.2",
        "1.20.0",
        "1.20.1",
        "1.21.0",
        "1.21.1",
        "1.22.0",
        "1.22.1",
        "1.23.0",
        "1.23.1",
        "1.24.0",
        "1.24.1",
        "1.24.2",
        "1.25.0",
        "1.25.1",
        "1.26.0",
        "1.26.1",
        "1.26.2",
        "1.26.3",
        "1.26.4",
        "1.27.0",
        "1.27.1",
        "1.28.0",
        "1.29.0",
        "1.29.1",
        "1.29.2",
        "1.29.3",
        "1.29.4",
        "1.29.5",
        "1.29.6",
        "1.29.7",
        "1.3.0",
        "1.30.0",
        "1.30.1",
        "1.30.2",
        "1.31.0",
        "1.32.0",
        "1.33.0",
        "1.34.0",
        "1.35.0",
        "1.35.1",
        "1.36.0",
        "1.37.0",
        "1.4.0",
        "1.5.0",
        "1.6.0",
        "1.7.0",
        "1.8.0",
        "1.8.1",
        "1.8.2",
        "1.9.0"
      ]
    }
  ],
  "aliases": [
    "CVE-2026-21226",
    "GHSA-jm66-cg57-jjv5"
  ],
  "details": "Deserialization of untrusted data in Azure Core shared client library for Python allows an authorized attacker to execute code over a network.",
  "id": "PYSEC-2026-1208",
  "modified": "2026-07-07T17:23:48.949401Z",
  "published": "2026-07-07T16:03:18.455480Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-21226"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/Azure/azure-sdk-for-python"
    },
    {
      "type": "WEB",
      "url": "https://github.com/Azure/azure-sdk-for-python/blob/6d2e6431ea0991861640e449e51e894247a7771a/sdk/core/azure-core/CHANGELOG.md#1380-2026-01-12"
    },
    {
      "type": "WEB",
      "url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-21226"
    },
    {
      "type": "PACKAGE",
      "url": "https://pypi.org/project/azure-core"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/advisories/GHSA-jm66-cg57-jjv5"
    }
  ],
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Azure Core is vulnerable to deserialization of untrusted data"
}



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