{
  "fix": "RHSA-2026:68549",
  "url": "https://patchblox.com/security/fix/linux/rhsa-2026-68549",
  "summary": "RHSA-2026:68549, released September 27, 2026, fixes 10 CVEs in firefox (version 0:140.15.0-1.el8_10). None of them is reported as exploited. Patch Radar priority: Urgent.",
  "platform": "linux",
  "type": "advisory",
  "title": "firefox security update",
  "released": "2026-09-27T20:04:47Z",
  "priority": "Urgent",
  "priorityTier": 2,
  "priorityReason": "Closes CVE-2026-75874, rated Critical",
  "supported": true,
  "cveCount": 10,
  "exploitedCveCount": 0,
  "kevCveCount": 0,
  "ransomwareCveCount": 0,
  "maxEpss": 0.00455,
  "maxCvss": 10,
  "vendorAdvisory": "https://access.redhat.com/errata/RHSA-2026:68549",
  "appliesTo": [
    {
      "product": "firefox",
      "productUrl": "https://patchblox.com/security/product/linux/firefox",
      "release": "RHEL 8",
      "fixedVersion": "0:140.15.0-1.el8_10",
      "supported": true
    }
  ],
  "cves": [
    {
      "cveId": "CVE-2026-75874",
      "url": "https://patchblox.com/security/cve/CVE-2026-75874",
      "title": "Sandbox escape in the Remote Settings Client component",
      "priority": "Urgent",
      "severity": "critical",
      "cvss": 10,
      "epss": 0.00455,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2026-84143",
      "url": "https://patchblox.com/security/cve/CVE-2026-84143",
      "title": "Internally found bugs fixed in Thunderbird 155, Thunderbird ESR 153.2 and Thunderbird ESR 140.15",
      "priority": "Urgent",
      "severity": "critical",
      "cvss": 9.8,
      "epss": 0.00378,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2026-84119",
      "url": "https://patchblox.com/security/cve/CVE-2026-84119",
      "title": "Sandbox escape due to use-after-free in the DOM: Navigation component",
      "priority": "Urgent",
      "severity": "critical",
      "cvss": 9.6,
      "epss": 0.00319,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2026-84121",
      "url": "https://patchblox.com/security/cve/CVE-2026-84121",
      "title": "Sandbox escape due to use-after-free in the DOM: Security component",
      "priority": "Urgent",
      "severity": "critical",
      "cvss": 9.6,
      "epss": 0.00319,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2026-84145",
      "url": "https://patchblox.com/security/cve/CVE-2026-84145",
      "title": "Internally found bugs fixed in Thunderbird 155, Thunderbird ESR 153.2 and Thunderbird ESR 140.15",
      "priority": "High",
      "severity": "high",
      "cvss": 7.5,
      "epss": 0.0037,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2026-84131",
      "url": "https://patchblox.com/security/cve/CVE-2026-84131",
      "title": "Privilege escalation due to invalid pointer in the Graphics component",
      "priority": "High",
      "severity": "high",
      "cvss": 8.8,
      "epss": 0.00328,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2026-16365",
      "url": "https://patchblox.com/security/cve/CVE-2026-16365",
      "title": "Privilege escalation in the DOM: Workers component",
      "priority": "High",
      "severity": "high",
      "cvss": 8.8,
      "epss": 0.00278,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2026-84120",
      "url": "https://patchblox.com/security/cve/CVE-2026-84120",
      "title": "Use-after-free in the Audio/Video component",
      "priority": "High",
      "severity": "medium",
      "cvss": 7.5,
      "epss": 0.00219,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2026-84122",
      "url": "https://patchblox.com/security/cve/CVE-2026-84122",
      "title": "Use-after-free in the Audio/Video component",
      "priority": "High",
      "severity": "medium",
      "cvss": 7.5,
      "epss": 0.00214,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2026-84124",
      "url": "https://patchblox.com/security/cve/CVE-2026-84124",
      "title": "Use-after-free in the DOM: Core \u0026 HTML component",
      "priority": "High",
      "severity": "medium",
      "cvss": 8.8,
      "epss": 0.0017,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    }
  ],
  "dataAsOf": "2026-11-07T18:46:35Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}