{
  "fix": "Microsoft Edge WebView2 Runtime 145.0.3800.97",
  "url": "https://patchblox.com/security/fix/windows-app/microsoft.edgewebview2runtime-145.0.3800.97",
  "summary": "Microsoft Edge WebView2 Runtime 145.0.3800.97, released March 6, 2026, fixes 8 CVEs in Microsoft Edge WebView2 Runtime. None of them is reported as exploited. Patch Radar priority: Urgent. The latest Microsoft Edge WebView2 Runtime is 157.0.4341.42, which also fixes every one of these CVEs.",
  "platform": "windows-app",
  "type": "app-version",
  "title": "Microsoft Edge WebView2 Runtime 145.0.3800.97",
  "released": "2026-03-06T00:00:00Z",
  "priority": "Urgent",
  "priorityTier": 2,
  "priorityReason": "Closes CVE-2026-3538, rated Critical",
  "supported": true,
  "cveCount": 8,
  "exploitedCveCount": 0,
  "kevCveCount": 0,
  "ransomwareCveCount": 0,
  "maxEpss": 0.00779,
  "maxCvss": 9.6,
  "appliesTo": [
    {
      "product": "Microsoft Edge WebView2 Runtime",
      "productUrl": "https://patchblox.com/security/product/windows-app/microsoft-edge-webview2-runtime",
      "fixedVersion": "145.0.3800.97",
      "latestVersion": "157.0.4341.42",
      "supported": true
    }
  ],
  "supersededBy": {
    "product": "Microsoft Edge WebView2 Runtime",
    "latestVersion": "157.0.4341.42",
    "productUrl": "https://patchblox.com/security/product/windows-app/microsoft-edge-webview2-runtime"
  },
  "cves": [
    {
      "cveId": "CVE-2026-3538",
      "url": "https://patchblox.com/security/cve/CVE-2026-3538",
      "title": "Chromium: CVE-2026-3538 Integer overflow in Skia",
      "priority": "Urgent",
      "severity": "CRITICAL",
      "cvss": 9.6,
      "epss": 0.00779,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2026-3536",
      "url": "https://patchblox.com/security/cve/CVE-2026-3536",
      "title": "Chromium: CVE-2026-3536 Integer overflow in ANGLE",
      "priority": "Urgent",
      "severity": "CRITICAL",
      "cvss": 9.6,
      "epss": 0.00704,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2026-3545",
      "url": "https://patchblox.com/security/cve/CVE-2026-3545",
      "title": "Chromium: CVE-2026-3545 Insufficient data validation in Navigation",
      "priority": "Urgent",
      "severity": "critical",
      "cvss": 9.6,
      "epss": 0.00407,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2026-3542",
      "url": "https://patchblox.com/security/cve/CVE-2026-3542",
      "title": "Chromium: CVE-2026-3542 Inappropriate implementation in WebAssembly",
      "priority": "High",
      "severity": "high",
      "cvss": 8.8,
      "epss": 0.00396,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2026-3544",
      "url": "https://patchblox.com/security/cve/CVE-2026-3544",
      "title": "Chromium: CVE-2026-3544 Heap buffer overflow in WebCodecs",
      "priority": "High",
      "severity": "high",
      "cvss": 8.8,
      "epss": 0.00354,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2026-3540",
      "url": "https://patchblox.com/security/cve/CVE-2026-3540",
      "title": "Chromium: CVE-2026-3540 Inappropriate implementation in WebAudio",
      "priority": "High",
      "severity": "high",
      "cvss": 8.8,
      "epss": 0.00339,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2026-3543",
      "url": "https://patchblox.com/security/cve/CVE-2026-3543",
      "title": "Chromium: CVE-2026-3543 Inappropriate implementation in V8",
      "priority": "High",
      "severity": "high",
      "cvss": 8.8,
      "epss": 0.00327,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2026-3541",
      "url": "https://patchblox.com/security/cve/CVE-2026-3541",
      "title": "Chromium: CVE-2026-3541 Inappropriate implementation in CSS",
      "priority": "High",
      "severity": "high",
      "cvss": 8.8,
      "epss": 0.00292,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    }
  ],
  "dataAsOf": "2026-11-11T13:47:35Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}