{
  "fix": "libexpat1 2.7.4-1ubuntu0.1",
  "url": "https://patchblox.com/security/fix/linux/ubuntu-resolute-libexpat1-2.7.4-1ubuntu0.1",
  "summary": "libexpat1 2.7.4-1ubuntu0.1, released June 21, 2026, fixes 11 CVEs in libexpat1. None of them is reported as exploited. Patch Radar priority: High.",
  "platform": "linux",
  "type": "package",
  "title": "libexpat1 2.7.4-1ubuntu0.1 for Ubuntu 26.04.1 LTS (resolute)",
  "released": "2026-06-21T10:16:00Z",
  "priority": "High",
  "priorityTier": 3,
  "priorityReason": "Closes CVE-2026-45186, high severity",
  "supported": true,
  "cveCount": 11,
  "exploitedCveCount": 0,
  "kevCveCount": 0,
  "ransomwareCveCount": 0,
  "maxEpss": 0.00479,
  "maxCvss": 8.2,
  "appliesTo": [
    {
      "product": "libexpat1",
      "productUrl": "https://patchblox.com/security/product/linux/libexpat1",
      "release": "Ubuntu 26.04.1 LTS (resolute)",
      "fixedVersion": "2.7.4-1ubuntu0.1",
      "supported": true
    }
  ],
  "cves": [
    {
      "cveId": "CVE-2026-45186",
      "url": "https://patchblox.com/security/cve/CVE-2026-45186",
      "title": "In libexpat before 2.8.1, the computational complexity of attribute name collision checks allows a denial of service via moderately sized crafted XML input.",
      "priority": "High",
      "severity": "Low",
      "cvss": 8.2,
      "epss": 0.00479,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2026-41080",
      "url": "https://patchblox.com/security/cve/CVE-2026-41080",
      "title": "expat: libexpat before 2.8.0 uses insufficient entropy, and thus hash flooding can occur via a crafted XML document.",
      "priority": "Routine",
      "severity": "low",
      "cvss": 2.9,
      "epss": 0.00398,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2026-32777",
      "url": "https://patchblox.com/security/cve/CVE-2026-32777",
      "title": "libexpat before 2.7.5 allows an infinite loop while parsing DTD content.",
      "priority": "Routine",
      "severity": "Low",
      "cvss": 5.5,
      "epss": 0.0024,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2026-56412",
      "url": "https://patchblox.com/security/cve/CVE-2026-56412",
      "title": "libexpat before 2.8.2 does not consider XML_TOK_DATA_CHARS in doCdataSection and thus lacks handler call depth tracking for various calls from within handlers in cases of a policy violation. Thus, a use-after-free can occur. NOTE: this issue exists because of an incomplete fix for CVE-2026-50219.",
      "priority": "Routine",
      "severity": "Moderate",
      "cvss": 5.9,
      "epss": 0.00194,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2026-32778",
      "url": "https://patchblox.com/security/cve/CVE-2026-32778",
      "title": "libexpat before 2.7.5 allows a NULL pointer dereference in the function setContext on retry after an earlier ouf-of-memory condition.",
      "priority": "Routine",
      "severity": "Low",
      "cvss": 5.5,
      "epss": 0.00192,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2026-32776",
      "url": "https://patchblox.com/security/cve/CVE-2026-32776",
      "title": "libexpat before 2.7.5 allows a NULL pointer dereference with empty external parameter entity content.",
      "priority": "Routine",
      "severity": "Moderate",
      "cvss": 5.5,
      "epss": 0.0019,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2026-50219",
      "url": "https://patchblox.com/security/cve/CVE-2026-50219",
      "title": "libexpat before 2.8.2 lacks handler call depth tracking for calls to XML_GetBuffer, XML_Parse, XML_ParseBuffer, XML_ParserFree, or XML_ParserReset from within handlers in cases of a policy violation. Thus, a use-after-free can occur,",
      "priority": "Routine",
      "severity": "Low",
      "cvss": 6.9,
      "epss": 0.00189,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2026-56403",
      "url": "https://patchblox.com/security/cve/CVE-2026-56403",
      "title": "libexpat before 2.8.2 has an integer overflow in storeAtts.",
      "priority": "Routine",
      "severity": "Moderate",
      "cvss": 6.9,
      "epss": 0.00182,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2026-56404",
      "url": "https://patchblox.com/security/cve/CVE-2026-56404",
      "title": "libexpat before 2.8.2 has an integer overflow in addBinding.",
      "priority": "Routine",
      "severity": "Moderate",
      "cvss": 6.9,
      "epss": 0.00146,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2026-56405",
      "url": "https://patchblox.com/security/cve/CVE-2026-56405",
      "title": "libexpat before 2.8.2 has an integer overflow in getAttributeId.",
      "priority": "Routine",
      "severity": "Moderate",
      "cvss": 6.9,
      "epss": 0.00141,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2026-56408",
      "url": "https://patchblox.com/security/cve/CVE-2026-56408",
      "title": "expat: libexpat before 2.8.2 has an integer overflow in copyString.",
      "priority": "Routine",
      "severity": "medium",
      "cvss": 6.9,
      "epss": 0.00141,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    }
  ],
  "dataAsOf": "2026-11-12T07:53:35Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}