CVE-2026-102633 affecting package expat 2.8.3-2

{
  "id": "f07a4a37741aa4ebe262be0b52c2b9603feec2f58646eb8a5aa2e7f0e0adc213",
  "url": "https://osv.dev/vulnerability/AZL-105048",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2026-102633 affecting package expat 2.8.3-2",
    "summary": "libexpat versions 2.7.2 through 2.8.5 contain an integer overflow vulnerability in expat_realloc() function on 32-bit platforms when computing allocation sizes. Attackers supplying malicious XML to applications parsing with vulnerable libexpat can cause heap buffer overflow, memory corruption, or denial of service.",
    "evidence": "osv:AZL-105048",
    "products": [
      {
        "name": {
          "value": "expat",
          "evidence": "/affected/0/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [],
        "affected_versions": []
      }
    ],
    "severity": "unknown",
    "structured": {
      "id": "AZL-105048",
      "aliases": [
        "AZL-105048"
      ],
      "affected": [
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "last_affected": "2.8.3-2"
                }
              ]
            }
          ],
          "package": {
            "name": "expat",
            "purl": "pkg:rpm/azure-linux/expat",
            "ecosystem": "Azure Linux:3"
          },
          "database_specific": {
            "source": "https://github.com/microsoft/AzureLinuxVulnerabilityData/blob/main/osv/AZL-105048.json"
          }
        }
      ],
      "modified": "2026-10-15T05:37:09Z",
      "provider": "osv",
      "upstream": [
        "CVE-2026-102633"
      ],
      "references": [
        "https://nvd.nist.gov/vuln/detail/CVE-2026-102633"
      ]
    },
    "related_cves": [
      {
        "value": "CVE-2026-102633",
        "evidence": "/upstream"
      }
    ],
    "security_relevant": true,
    "severity_evidence": null
  },
  "source_id": "core-osv",
  "document_id": 321260,
  "published_at": "2026-09-29T17:17:06+00:00"
}