{
  "fix": "Microsoft Edge WebView2 Runtime 134.0.3124.51",
  "url": "https://patchblox.com/security/fix/windows-app/microsoft.edgewebview2runtime-134.0.3124.51",
  "summary": "Microsoft Edge WebView2 Runtime 134.0.3124.51, released March 5, 2025, fixes 8 CVEs in Microsoft Edge WebView2 Runtime. None of them is reported as exploited. Patch Radar priority: High. 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 134.0.3124.51",
  "released": "2025-03-05T00:00:00Z",
  "priority": "High",
  "priorityTier": 3,
  "priorityReason": "Closes CVE-2025-1915, high severity",
  "supported": true,
  "cveCount": 8,
  "exploitedCveCount": 0,
  "kevCveCount": 0,
  "ransomwareCveCount": 0,
  "maxEpss": 0.00714,
  "maxCvss": 8.8,
  "appliesTo": [
    {
      "product": "Microsoft Edge WebView2 Runtime",
      "productUrl": "https://patchblox.com/security/product/windows-app/microsoft-edge-webview2-runtime",
      "fixedVersion": "134.0.3124.51",
      "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-2025-1915",
      "url": "https://patchblox.com/security/cve/CVE-2025-1915",
      "title": "Chromium: CVE-2025-1915 Improper Limitation of a Pathname to a Restricted Directory in DevTools",
      "priority": "High",
      "severity": "high",
      "cvss": 8.1,
      "epss": 0.00418,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2025-1918",
      "url": "https://patchblox.com/security/cve/CVE-2025-1918",
      "title": "Chromium: CVE-2025-1918 Out of bounds read in PDFium",
      "priority": "High",
      "severity": "high",
      "cvss": 8.8,
      "epss": 0.00398,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2025-1914",
      "url": "https://patchblox.com/security/cve/CVE-2025-1914",
      "title": "Chromium: CVE-2025-1914 Out of bounds read in V8",
      "priority": "High",
      "severity": "high",
      "cvss": 8.8,
      "epss": 0.00393,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2025-1919",
      "url": "https://patchblox.com/security/cve/CVE-2025-1919",
      "title": "Chromium: CVE-2025-1919 Out of bounds read in Media",
      "priority": "High",
      "severity": "high",
      "cvss": 8.8,
      "epss": 0.00393,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2025-1916",
      "url": "https://patchblox.com/security/cve/CVE-2025-1916",
      "title": "Chromium: CVE-2025-1916 Use after free in Profiles",
      "priority": "High",
      "severity": "high",
      "cvss": 8.8,
      "epss": 0.00283,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2025-26643",
      "url": "https://patchblox.com/security/cve/CVE-2025-26643",
      "title": "Microsoft Edge (Chromium-based) Spoofing Vulnerability",
      "priority": "Routine",
      "severity": "Low",
      "cvss": 5.4,
      "epss": 0.00714,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2025-1921",
      "url": "https://patchblox.com/security/cve/CVE-2025-1921",
      "title": "Chromium: CVE-2025-1921 Inappropriate Implementation in Media Stream",
      "priority": "Routine",
      "severity": "medium",
      "cvss": 6.5,
      "epss": 0.0033,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2025-1923",
      "url": "https://patchblox.com/security/cve/CVE-2025-1923",
      "title": "Chromium: CVE-2025-1923 Inappropriate Implementation in Permission Prompts",
      "priority": "Routine",
      "severity": "medium",
      "cvss": 4.3,
      "epss": 0.00208,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    }
  ],
  "dataAsOf": "2026-11-11T07:45:43Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}