CVE-2026-93990 affecting package python3 3.12.14-2

{
  "id": "edf6fd5f0f26302e74e77ec879c5943775e6f061895ab6f6d65680c4762edc01",
  "url": "https://osv.dev/vulnerability/AZL-105260",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2026-93990 affecting package python3 3.12.14-2",
    "summary": "Expat before 2.8.5 fails to validate that a high surrogate in UTF-16 input is followed by a low surrogate, allowing malformed UTF-16 sequences to be accepted. Attackers can supply UTF-16 encoded XML containing lone high surrogates that consume the following code unit, causing Expat to pass unpaired surrogates to applications built with XML_UNICODE and to silently replace input characters in other builds.",
    "evidence": "osv:AZL-105260",
    "products": [
      {
        "name": {
          "value": "python3",
          "evidence": "/affected/0/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [],
        "affected_versions": []
      }
    ],
    "severity": "unknown",
    "structured": {
      "id": "AZL-105260",
      "aliases": [
        "AZL-105260"
      ],
      "affected": [
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "last_affected": "3.12.14-2"
                }
              ]
            }
          ],
          "package": {
            "name": "python3",
            "purl": "pkg:rpm/azure-linux/python3",
            "ecosystem": "Azure Linux:3"
          },
          "database_specific": {
            "source": "https://github.com/microsoft/AzureLinuxVulnerabilityData/blob/main/osv/AZL-105260.json"
          }
        }
      ],
      "modified": "2026-10-15T05:37:09Z",
      "provider": "osv",
      "upstream": [
        "CVE-2026-93990"
      ],
      "references": [
        "https://nvd.nist.gov/vuln/detail/CVE-2026-93990"
      ]
    },
    "related_cves": [
      {
        "value": "CVE-2026-93990",
        "evidence": "/upstream"
      }
    ],
    "security_relevant": true,
    "severity_evidence": null
  },
  "source_id": "core-osv",
  "document_id": 321289,
  "published_at": "2026-09-19T23:17:10+00:00"
}