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CVE-2026-4360 affecting package python-py 1.11.0-1

Type: advisorySources: OSV

In the Tarfile.extract() function, the filter parameter is not passed properly when extracting hardlinks. An affected system that extracts content from untrusted tar files could end up writing files with an unexpected uid/gid despite the user passing filter='data' to the extract() function.

Products
python-py
Affected versions
Not specified
Fixed versions
Not specified
CVEs
CVE-2026-4360
Confirmed fixed CVEs
Not specified
Updated in this feed
1 Nov 2026, 17:28 UTC · Revision 1

Source evidence

CVE-2026-4360 affecting package python-py 1.11.0-1

core-osv · Original source

Published 30 Jun 2026, 15:16 UTC

In the Tarfile.extract() function, the filter parameter is not passed properly when extracting hardlinks. An affected system that extracts content from untrusted tar files could end up writing files with an unexpected uid/gid despite the user passing filter='data' to the extract() function.

osv:AZL-109710

python-py

Fixed versions: Not specified

Complete source record
{
  "id": "77552ad726f3c659e8b5556b544713099486abab00ca52a7b237f99410b3a4c8",
  "url": "https://osv.dev/vulnerability/AZL-109710",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2026-4360 affecting package python-py 1.11.0-1",
    "summary": "In the Tarfile.extract() function, the filter parameter is not passed properly when extracting hardlinks. An affected system that extracts content from untrusted tar files could end up writing files with an unexpected uid/gid despite the user passing filter='data' to the extract() function.",
    "evidence": "osv:AZL-109710",
    "products": [
      {
        "name": {
          "value": "python-py",
          "evidence": "/affected/0/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [],
        "affected_versions": []
      }
    ],
    "severity": "unknown",
    "structured": {
      "id": "AZL-109710",
      "aliases": [
        "AZL-109710"
      ],
      "affected": [
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "last_affected": "1.11.0-1"
                }
              ]
            }
          ],
          "package": {
            "name": "python-py",
            "purl": "pkg:rpm/azure-linux/python-py",
            "ecosystem": "Azure Linux:3"
          },
          "database_specific": {
            "source": "https://github.com/microsoft/AzureLinuxVulnerabilityData/blob/main/osv/AZL-109710.json"
          }
        }
      ],
      "modified": "2026-10-27T05:36:16Z",
      "provider": "osv",
      "upstream": [
        "CVE-2026-4360"
      ],
      "references": [
        "https://nvd.nist.gov/vuln/detail/CVE-2026-4360"
      ]
    },
    "related_cves": [
      {
        "value": "CVE-2026-4360",
        "evidence": "/upstream"
      }
    ],
    "security_relevant": true,
    "severity_evidence": null
  },
  "source_id": "core-osv",
  "document_id": 460527,
  "published_at": "2026-06-30T15:16:57+00:00"
}