Vulnerability-Lookup

PYSEC-2026-1208

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

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

JSON

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"
}

CVE-2026-21226 (GCVE-0-2026-21226)

Vulnerability from cvelistv5 – Published: 2026-01-13 18:04 – Updated: 2026-04-01 13:49

Title

Azure Core shared client library for Python Remote Code Execution Vulnerability

Summary

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/E:U/RL:O/RC:C

SSVC

Exploitation: none Automatable: no Technical Impact: total

CISA Coordinator (v2.0.3)

CWE

CWE-502 - Deserialization of Untrusted Data

Assigner

microsoft

References

1 reference

URL	Tags
https://msrc.microsoft.com/update-guide/vulnerabi…	vendor-advisorypatch

Impacted products

1 product

Vendor	Product	Version
Microsoft	Azure Core shared client library for Python	Affected: 1.1.0 , < 1.38.0 (custom)

Date Public

2026-01-13 16:00

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-21226",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "total"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-01-13T18:28:13.612748Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-01-13T18:28:47.587Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "Azure Core shared client library for Python",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "1.38.0",
              "status": "affected",
              "version": "1.1.0",
              "versionType": "custom"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:a:microsoft:azure_core_shared_client_library_for_python:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "1.38.0",
                  "versionStartIncluding": "1.1.0",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "datePublic": "2026-01-13T16:00:00.000Z",
      "descriptions": [
        {
          "lang": "en-US",
          "value": "Deserialization of untrusted data in Azure Core shared client library for Python allows an authorized attacker to execute code over a network."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 7.5,
            "baseSeverity": "HIGH",
            "vectorString": "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",
            "version": "3.1"
          },
          "format": "CVSS",
          "scenarios": [
            {
              "lang": "en-US",
              "value": "GENERAL"
            }
          ]
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-502",
              "description": "CWE-502: Deserialization of Untrusted Data",
              "lang": "en-US",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-04-01T13:49:21.414Z",
        "orgId": "f38d906d-7342-40ea-92c1-6c4a2c6478c8",
        "shortName": "microsoft"
      },
      "references": [
        {
          "name": "Azure Core shared client library for Python Remote Code Execution Vulnerability",
          "tags": [
            "vendor-advisory",
            "patch"
          ],
          "url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-21226"
        }
      ],
      "title": "Azure Core shared client library for Python Remote Code Execution Vulnerability"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "f38d906d-7342-40ea-92c1-6c4a2c6478c8",
    "assignerShortName": "microsoft",
    "cveId": "CVE-2026-21226",
    "datePublished": "2026-01-13T18:04:55.084Z",
    "dateReserved": "2025-12-11T21:02:05.732Z",
    "dateUpdated": "2026-04-01T13:49:21.414Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

GHSA-JM66-CG57-JJV5

Vulnerability from github – Published: 2026-01-13 21:31 – Updated: 2026-01-13 21:57

Summary

Azure Core is vulnerable to deserialization of untrusted data

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

Show details on source website

JSON

To clipboard

{
  "affected": [
    {
      "package": {
        "ecosystem": "PyPI",
        "name": "azure-core"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.38.0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-21226"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-502"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-01-13T21:57:47Z",
    "nvd_published_at": "2026-01-13T19:16:23Z",
    "severity": "HIGH"
  },
  "details": "Deserialization of untrusted data in Azure Core shared client library for Python allows an authorized attacker to execute code over a network.",
  "id": "GHSA-jm66-cg57-jjv5",
  "modified": "2026-01-13T21:57:47Z",
  "published": "2026-01-13T21:31:44Z",
  "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"
    }
  ],
  "schema_version": "1.4.0",
  "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"
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

Action not permitted

PYSEC-2026-1208

CVE-2026-21226 (GCVE-0-2026-21226)

GHSA-JM66-CG57-JJV5

Tags

Sightings

Nomenclature