{
  "fix": "ELSA-2026-49621",
  "url": "https://patchblox.com/security/fix/linux/elsa-2026-49621",
  "summary": "ELSA-2026-49621, released August 3, 2026, fixes 33 CVEs in thunderbird (version 0:140.13.0-1.0.1.el10_2). None of them is reported as exploited. Patch Radar priority: Urgent.",
  "platform": "linux",
  "type": "advisory",
  "title": "thunderbird security update",
  "released": "2026-08-03T00:00:00Z",
  "priority": "Urgent",
  "priorityTier": 2,
  "priorityReason": "Closes CVE-2026-16357, rated Critical",
  "supported": true,
  "cveCount": 33,
  "exploitedCveCount": 0,
  "kevCveCount": 0,
  "ransomwareCveCount": 0,
  "maxEpss": 0.00868,
  "maxCvss": 9.8,
  "vendorAdvisory": "https://linux.oracle.com/errata/ELSA-2026-49621.html",
  "appliesTo": [
    {
      "product": "thunderbird",
      "productUrl": "https://patchblox.com/security/product/linux/thunderbird",
      "release": "ol 10",
      "fixedVersion": "0:140.13.0-1.0.1.el10_2",
      "supported": true
    }
  ],
  "cves": [
    {
      "cveId": "CVE-2026-16357",
      "url": "https://patchblox.com/security/cve/CVE-2026-16357",
      "title": "Incorrect boundary conditions in the Graphics component",
      "priority": "Urgent",
      "severity": "critical",
      "cvss": 9.8,
      "epss": 0.00868,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2026-16363",
      "url": "https://patchblox.com/security/cve/CVE-2026-16363",
      "title": "JIT miscompilation in the JavaScript: WebAssembly component",
      "priority": "Urgent",
      "severity": "critical",
      "cvss": 9.8,
      "epss": 0.0064,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2026-16369",
      "url": "https://patchblox.com/security/cve/CVE-2026-16369",
      "title": "Integer overflow in the JavaScript: WebAssembly component",
      "priority": "Urgent",
      "severity": "critical",
      "cvss": 9.8,
      "epss": 0.0064,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2026-16412",
      "url": "https://patchblox.com/security/cve/CVE-2026-16412",
      "title": "Memory safety bugs fixed in Thunderbird ESR 140.13 and Thunderbird 153",
      "priority": "Urgent",
      "severity": "critical",
      "cvss": 9.8,
      "epss": 0.00609,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2026-16350",
      "url": "https://patchblox.com/security/cve/CVE-2026-16350",
      "title": "Incorrect boundary conditions in the Audio/Video: cubeb component",
      "priority": "Urgent",
      "severity": "critical",
      "cvss": 9.8,
      "epss": 0.00595,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2026-16353",
      "url": "https://patchblox.com/security/cve/CVE-2026-16353",
      "title": "Invalid pointer in the DOM: Bindings (WebIDL) component",
      "priority": "Urgent",
      "severity": "critical",
      "cvss": 9.8,
      "epss": 0.00595,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2026-16355",
      "url": "https://patchblox.com/security/cve/CVE-2026-16355",
      "title": "JIT miscompilation in the JavaScript Engine: JIT component",
      "priority": "Urgent",
      "severity": "critical",
      "cvss": 9.8,
      "epss": 0.00595,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2026-16351",
      "url": "https://patchblox.com/security/cve/CVE-2026-16351",
      "title": "Sandbox escape due to use-after-free in the DOM: Navigation component",
      "priority": "Urgent",
      "severity": "critical",
      "cvss": 9.8,
      "epss": 0.00578,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2026-16352",
      "url": "https://patchblox.com/security/cve/CVE-2026-16352",
      "title": "Sandbox escape due to use-after-free in the Disability Access APIs component",
      "priority": "Urgent",
      "severity": "critical",
      "cvss": 9.8,
      "epss": 0.00578,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2026-16356",
      "url": "https://patchblox.com/security/cve/CVE-2026-16356",
      "title": "Sandbox escape due to use-after-free in the Disability Access APIs component",
      "priority": "Urgent",
      "severity": "critical",
      "cvss": 9.8,
      "epss": 0.00578,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2026-16361",
      "url": "https://patchblox.com/security/cve/CVE-2026-16361",
      "title": "Memory safety bugs fixed in Thunderbird ESR 140.13",
      "priority": "Urgent",
      "severity": "critical",
      "cvss": 9.8,
      "epss": 0.0057,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2026-16377",
      "url": "https://patchblox.com/security/cve/CVE-2026-16377",
      "title": "Mitigation bypass in the PDF Viewer component",
      "priority": "Urgent",
      "severity": "critical",
      "cvss": 9.8,
      "epss": 0.00568,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2026-16383",
      "url": "https://patchblox.com/security/cve/CVE-2026-16383",
      "title": "Mitigation bypass in the DOM: Networking component",
      "priority": "Urgent",
      "severity": "critical",
      "cvss": 9.8,
      "epss": 0.00568,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2026-16359",
      "url": "https://patchblox.com/security/cve/CVE-2026-16359",
      "title": "Incorrect boundary conditions in the Audio/Video: GMP component",
      "priority": "Urgent",
      "severity": "critical",
      "cvss": 9.1,
      "epss": 0.00469,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2026-16360",
      "url": "https://patchblox.com/security/cve/CVE-2026-16360",
      "title": "Memory safety bugs fixed in Thunderbird ESR 140.13 and Thunderbird 153",
      "priority": "Urgent",
      "severity": "critical",
      "cvss": 9.8,
      "epss": 0.00468,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2026-16390",
      "url": "https://patchblox.com/security/cve/CVE-2026-16390",
      "title": "Mitigation bypass in the Enterprise Policies component",
      "priority": "Urgent",
      "severity": "critical",
      "cvss": 9.1,
      "epss": 0.00442,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2026-16368",
      "url": "https://patchblox.com/security/cve/CVE-2026-16368",
      "title": "Incorrect boundary conditions in the JavaScript: WebAssembly component",
      "priority": "Urgent",
      "severity": "critical",
      "cvss": 9.8,
      "epss": 0.00388,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2026-16358",
      "url": "https://patchblox.com/security/cve/CVE-2026-16358",
      "title": "Site isolation issue in the Graphics: WebRender component",
      "priority": "Urgent",
      "severity": "critical",
      "cvss": 9.8,
      "epss": 0.003,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2026-16349",
      "url": "https://patchblox.com/security/cve/CVE-2026-16349",
      "title": "Same-origin policy bypass in the DOM: Navigation component",
      "priority": "Urgent",
      "severity": "critical",
      "cvss": 9.8,
      "epss": 0.00299,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2026-16375",
      "url": "https://patchblox.com/security/cve/CVE-2026-16375",
      "title": "Site isolation issue in the Networking: HTTP component",
      "priority": "Urgent",
      "severity": "critical",
      "cvss": 9.8,
      "epss": 0.00291,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2026-16387",
      "url": "https://patchblox.com/security/cve/CVE-2026-16387",
      "title": "Site isolation issue in the Networking component",
      "priority": "Urgent",
      "severity": "critical",
      "cvss": 9.8,
      "epss": 0.00284,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2026-16381",
      "url": "https://patchblox.com/security/cve/CVE-2026-16381",
      "title": "Same-origin policy bypass in the Networking: DNS component",
      "priority": "Urgent",
      "severity": "critical",
      "cvss": 9.1,
      "epss": 0.0023,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2026-14899",
      "url": "https://patchblox.com/security/cve/CVE-2026-14899",
      "title": "Off-by-one out of bounds read in MIME header parser for forwarding",
      "priority": "High",
      "severity": "moderate",
      "cvss": 8.8,
      "epss": 0.00469,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2026-16354",
      "url": "https://patchblox.com/security/cve/CVE-2026-16354",
      "title": "Information disclosure in the Graphics: ImageLib component",
      "priority": "High",
      "severity": "high",
      "cvss": 8.8,
      "epss": 0.00465,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2026-16396",
      "url": "https://patchblox.com/security/cve/CVE-2026-16396",
      "title": "Privilege escalation in WebExtensions",
      "priority": "High",
      "severity": "high",
      "cvss": 8.8,
      "epss": 0.00452,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2026-16371",
      "url": "https://patchblox.com/security/cve/CVE-2026-16371",
      "title": "Privilege escalation in the DOM: Navigation component",
      "priority": "High",
      "severity": "high",
      "cvss": 8.8,
      "epss": 0.00444,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2026-16374",
      "url": "https://patchblox.com/security/cve/CVE-2026-16374",
      "title": "Information disclosure in the Framework component in DevTools",
      "priority": "High",
      "severity": "high",
      "cvss": 8.8,
      "epss": 0.00439,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2026-16391",
      "url": "https://patchblox.com/security/cve/CVE-2026-16391",
      "title": "Information disclosure in the Storage: IndexedDB component",
      "priority": "High",
      "severity": "high",
      "cvss": 8.8,
      "epss": 0.00439,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2026-16405",
      "url": "https://patchblox.com/security/cve/CVE-2026-16405",
      "title": "Information disclosure in the Networking: WebSockets component",
      "priority": "High",
      "severity": "high",
      "cvss": 8.8,
      "epss": 0.00439,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2026-16362",
      "url": "https://patchblox.com/security/cve/CVE-2026-16362",
      "title": "Use-after-free in the WebRTC: Audio/Video component",
      "priority": "High",
      "severity": "high",
      "cvss": 8.8,
      "epss": 0.00436,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2026-16379",
      "url": "https://patchblox.com/security/cve/CVE-2026-16379",
      "title": "Privilege escalation in the DOM: Content Processes component",
      "priority": "High",
      "severity": "high",
      "cvss": 8.8,
      "epss": 0.00415,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2026-15718",
      "url": "https://patchblox.com/security/cve/CVE-2026-15718",
      "title": "Invalid pointer in the JavaScript: WebAssembly component",
      "priority": "High",
      "severity": "medium",
      "cvss": 8.8,
      "epss": 0.00323,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2026-15719",
      "url": "https://patchblox.com/security/cve/CVE-2026-15719",
      "title": "Site isolation issue in the DOM: Navigation component",
      "priority": "High",
      "severity": "medium",
      "cvss": 8.8,
      "epss": 0.00287,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    }
  ],
  "dataAsOf": "2026-11-07T12:40:37Z"
}