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CVE-2025-8291 affecting package python-py 1.11.0-1

Type: advisorySources: OSV

The 'zipfile' module would not check the validity of the ZIP64 End of Central Directory (EOCD) Locator record offset value would not be used to locate the ZIP64 EOCD record, instead the ZIP64 EOCD record would be assumed to be the previous record in the ZIP archive. This could be abused to create ZIP archives that are handled differently by the 'zipfile' module compared to other ZIP implementations. Remediation maintains this behavior, but checks that the offset specified in the ZIP64 EOCD Locator record matches the expected value.

Products
python-py
Affected versions
Not specified
Fixed versions
Not specified
CVEs
CVE-2025-8291
Confirmed fixed CVEs
Not specified
Updated in this feed
1 Nov 2026, 17:31 UTC · Revision 1

Source evidence

CVE-2025-8291 affecting package python-py 1.11.0-1

core-osv · Original source

Published 7 Oct 2025, 18:16 UTC

The 'zipfile' module would not check the validity of the ZIP64 End of Central Directory (EOCD) Locator record offset value would not be used to locate the ZIP64 EOCD record, instead the ZIP64 EOCD record would be assumed to be the previous record in the ZIP archive. This could be abused to create ZIP archives that are handled differently by the 'zipfile' module compared to other ZIP implementations. Remediation maintains this behavior, but checks that the offset specified in the ZIP64 EOCD Locator record matches the expected value.

osv:AZL-110507

python-py

Fixed versions: Not specified

Complete source record
{
  "id": "3b9552698e9d970ab17391c64ec483596614c49df3ac8201f916c96480c26f4f",
  "url": "https://osv.dev/vulnerability/AZL-110507",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2025-8291 affecting package python-py 1.11.0-1",
    "summary": "The 'zipfile' module would not check the validity of the ZIP64 End of Central Directory (EOCD) Locator record offset value would not be used to locate the ZIP64 EOCD record, instead the ZIP64 EOCD record would be assumed to be the previous record in the ZIP archive. This could be abused to create ZIP archives that are handled differently by the 'zipfile' module compared to other ZIP implementations. Remediation maintains this behavior, but checks that the offset specified in the ZIP64 EOCD Locator record matches the expected value.",
    "evidence": "osv:AZL-110507",
    "products": [
      {
        "name": {
          "value": "python-py",
          "evidence": "/affected/0/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [],
        "affected_versions": []
      }
    ],
    "severity": "unknown",
    "structured": {
      "id": "AZL-110507",
      "aliases": [
        "AZL-110507"
      ],
      "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-110507.json"
          }
        }
      ],
      "modified": "2026-10-27T05:36:16Z",
      "provider": "osv",
      "upstream": [
        "CVE-2025-8291"
      ],
      "references": [
        "https://nvd.nist.gov/vuln/detail/CVE-2025-8291"
      ]
    },
    "related_cves": [
      {
        "value": "CVE-2025-8291",
        "evidence": "/upstream"
      }
    ],
    "security_relevant": true,
    "severity_evidence": null
  },
  "source_id": "core-osv",
  "document_id": 460634,
  "published_at": "2025-10-07T18:16:00+00:00"
}