{
  "cveId": "CVE-2026-109740",
  "url": "https://patchblox.com/security/cve/CVE-2026-109740",
  "summary": "CVE-2026-109740 is fixed in 5 products on 1 platform, first by RHSA-2026:89756, released October 31, 2026. It is not reported as exploited. Patch Radar priority: High.",
  "title": "firefox: Mozilla Firefox is an open-source web browser, designed for standards compliance, performance, and portability.\n\nSecu...",
  "description": "Mozilla Firefox is an open-source web browser, designed for standards compliance, performance, and portability.\n\nSecurity Fix(es):\n\n* libexpat: denial of service via crafted XML input (CVE-2026-45186)\n\n* firefox: thunderbird: Privilege escalation in the Application Update component (CVE-2026-109704)\n\n* firefox: Use-after-free in the XML component (CVE-2026-109718)\n\n* firefox: Information disclosure in the PDF Viewer component (CVE-2026-109742)\n\n* firefox: Incorrect boundary conditions in the JavaScript Engine component (CVE-2026-109715)\n\n* firefox: firefox: Sandbox escape via incorrect boundary conditions in Win32 widget (CVE-2026-109740)\n\n* firefox: Use-after-free in the Storage: IndexedDB component (CVE-2026-109706)\n\n* firefox: Use-after-free in the Crash Reporting component (CVE-2026-109713)\n\n* firefox: Use-after-free in the DOM: Core \u0026 HTML component (CVE-2026-109724)\n\n* firefox: Sandbox escape due to uninitialized memory in the DOM: Web Serial component (CVE-2026-109745)\n\n* firefox: Mitigation bypass in the File Handling component (CVE-2026-109782)\n\n* firefox: Information disclosure, privilege escalation in the Security: Process Sandboxing component (CVE-2026-109709)\n\n* firefox: Sandbox escape, site isolation issue due to incorrect boundary conditions, use-after-free in the Networking component (CVE-2026-109705)\n\n* firefox: Use-after-free in the Audio/Video: Playback component (CVE-2026-109738)\n\n* firefox: Use-after-free in the Storage: Bucket File System component (CVE-2026-109741)\n\n* firefox: Use-after-free in the JavaScript Engine: JIT component (CVE-2026-109729)\n\n* firefox: Other issue in the DOM: File component (CVE-2026-109744)\n\n* firefox: Incorrect boundary conditions in the JavaScript Engine component (CVE-2026-109716)\n\n* firefox: Race condition, use-after-free in the Graphics: CanvasWebGL component (CVE-2026-109719)\n\n* firefox: Incorrect boundary conditions in the Layout component (CVE-2026-109753)\n\n* firefox: Integer overflow in the Layout: Text and Fonts component (CVE-2026-109723)\n\n* firefox: JIT miscompilation in the JavaScript Engine: JIT component (CVE-2026-109733)\n\n* firefox: Sandbox escape due to incorrect boundary conditions in the Networking component (CVE-2026-109708)\n\n* firefox: Use-after-free in the DOM: Bindings (WebIDL) component (CVE-2026-109717)\n\n* firefox: Use-after-free in the DOM: Workers component (CVE-2026-109752)\n\n* firefox: Sandbox escape due to use-after-free in the Networking component (CVE-2026-109707)\n\n* firefox: JIT miscompilation in the JavaScript: WebAssembly component (CVE-2026-109720)\n\n* firefox: Use-after-free in the SVG component (CVE-2026-109726)\n\n* firefox: Integer overflow in the Graphics component (CVE-2026-109730)\n\n* firefox: Use-after-free in the Audio/Video component (CVE-2026-109727)\n\n* firefox: Mitigation bypass in the Enterprise Policies component (CVE-2026-109737)\n\n* firefox: Use-after-free in the DOM: Streams component (CVE-2026-109732)\n\n* firefox: Information disclosure in the Networking component (CVE-2026-109751)\n\n* firefox: Use-after-free in the DOM: Core \u0026 HTML component (CVE-2026-109725)\n\n* firefox: Sandbox escape due to uninitialized memory in the Graphics component (CVE-2026-109712)\n\n* firefox: Use-after-free in the Graphics: Canvas2D component (CVE-2026-109711)\n\n* firefox: Frame poisoning in the Layout component (CVE-2026-109736)\n\n* firefox: JIT miscompilation in the JavaScript Engine: JIT component (CVE-2026-109722)\n\n* firefox: Use-after-free in the DOM: Animation component (CVE-2026-109728)\n\n* firefox: Incorrect boundary conditions in the JavaScript Engine: JIT component (CVE-2026-109721)\n\n* firefox: Privilege escalation in the Panning and Zooming component (CVE-2026-109743)\n\nBug Fix(es) and Enhancement(s):\n\n* Firefox ESR 153 rebase [rhel-8.10.z] (JIRA:RHEL-175143)\n\nFor more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.",
  "published": "2026-10-13T12:29:26Z",
  "severity": "Important",
  "cvss": 8.2,
  "cvssVector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:L",
  "epss": 0.00349,
  "epssPercentile": 0.28784,
  "priority": "High",
  "priorityTier": 3,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
    {
      "platform": "linux",
      "product": "MozillaFirefox",
      "release": "opensuse-leap 16.0",
      "fixedVersion": "153.5.0-160000.1.1",
      "fix": "OPENSUSE-SU-2026:22139-1",
      "url": "https://patchblox.com/security/fix/linux/opensuse-su-2026-22139-1",
      "released": "2026-11-07T00:47:19Z"
    },
    {
      "platform": "linux",
      "product": "MozillaFirefox",
      "release": "sles 15.6",
      "fixedVersion": "153.5.0-150400.157.16.1",
      "fix": "SUSE-SU-2026:4834-1",
      "url": "https://patchblox.com/security/fix/linux/suse-su-2026-4834-1",
      "released": "2026-11-07T00:42:08Z"
    },
    {
      "platform": "linux",
      "product": "MozillaFirefox",
      "release": "sles 15.7",
      "fixedVersion": "153.5.0-150400.157.16.1",
      "fix": "SUSE-SU-2026:4834-1",
      "url": "https://patchblox.com/security/fix/linux/suse-su-2026-4834-1",
      "released": "2026-11-07T00:42:08Z"
    },
    {
      "platform": "linux",
      "product": "MozillaFirefox",
      "release": "sles 16.0",
      "fixedVersion": "153.5.0-160000.1.1",
      "fix": "SUSE-SU-2026:24260-1",
      "url": "https://patchblox.com/security/fix/linux/suse-su-2026-24260-1",
      "released": "2026-11-07T00:44:01Z"
    },
    {
      "platform": "linux",
      "product": "MozillaThunderbird",
      "release": "sles 15.7",
      "fixedVersion": "153.5.0-150400.13.9.1",
      "fix": "SUSE-SU-2026:4736-1",
      "url": "https://patchblox.com/security/fix/linux/suse-su-2026-4736-1",
      "released": "2026-11-07T00:43:02Z"
    },
    {
      "platform": "linux",
      "product": "firefox",
      "release": "RHEL 10",
      "fixedVersion": "153.5.0-1.el10_2",
      "fix": "RHSA-2026:89758",
      "url": "https://patchblox.com/security/fix/linux/rhsa-2026-89758",
      "released": "2026-10-31T22:20:28Z"
    },
    {
      "platform": "linux",
      "product": "firefox",
      "release": "RHEL 8",
      "fixedVersion": "0:153.5.0-1.el8_10",
      "fix": "RHSA-2026:89756",
      "url": "https://patchblox.com/security/fix/linux/rhsa-2026-89756",
      "released": "2026-10-31T22:18:57Z"
    },
    {
      "platform": "linux",
      "product": "firefox",
      "release": "RHEL 9",
      "fixedVersion": "0:153.5.0-1.el9_8",
      "fix": "RHSA-2026:89757",
      "url": "https://patchblox.com/security/fix/linux/rhsa-2026-89757",
      "released": "2026-10-31T22:20:28Z"
    },
    {
      "platform": "linux",
      "product": "firefox",
      "release": "almalinux 10",
      "fixedVersion": "153.5.0-1.el10_2",
      "fix": "ALSA-2026:89758",
      "url": "https://patchblox.com/security/fix/linux/alsa-2026-89758",
      "released": "2026-11-07T00:39:57Z"
    },
    {
      "platform": "linux",
      "product": "firefox",
      "release": "almalinux 8",
      "fixedVersion": "153.5.0-1.el8_10",
      "fix": "ALSA-2026:89756",
      "url": "https://patchblox.com/security/fix/linux/alsa-2026-89756",
      "released": "2026-11-07T00:40:18Z"
    },
    {
      "platform": "linux",
      "product": "firefox",
      "release": "almalinux 9",
      "fixedVersion": "153.5.0-1.el9_8",
      "fix": "ALSA-2026:89757",
      "url": "https://patchblox.com/security/fix/linux/alsa-2026-89757",
      "released": "2026-11-07T00:40:32Z"
    },
    {
      "platform": "linux",
      "product": "firefox",
      "release": "ol 10",
      "fixedVersion": "0:153.5.0-1.0.1.el10_2",
      "fix": "ELSA-2026-89758",
      "url": "https://patchblox.com/security/fix/linux/elsa-2026-89758",
      "released": "2026-11-07T00:59:15Z"
    },
    {
      "platform": "linux",
      "product": "firefox",
      "release": "ol 8",
      "fixedVersion": "0:153.5.0-1.0.1.el8_10",
      "fix": "ELSA-2026-89756",
      "url": "https://patchblox.com/security/fix/linux/elsa-2026-89756",
      "released": "2026-11-07T00:48:28Z"
    },
    {
      "platform": "linux",
      "product": "firefox",
      "release": "ol 9",
      "fixedVersion": "0:153.5.0-1.0.1.el9_8",
      "fix": "ELSA-2026-89757",
      "url": "https://patchblox.com/security/fix/linux/elsa-2026-89757",
      "released": "2026-11-07T00:52:27Z"
    },
    {
      "platform": "linux",
      "product": "firefox",
      "release": "rocky 10",
      "fixedVersion": "0:153.5.0-1.el10_2",
      "fix": "RLSA-2026:89758",
      "url": "https://patchblox.com/security/fix/linux/rlsa-2026-89758",
      "released": "2026-11-07T00:39:51Z"
    },
    {
      "platform": "linux",
      "product": "firefox",
      "release": "rocky 8",
      "fixedVersion": "0:153.5.0-1.el8_10",
      "fix": "RLSA-2026:89756",
      "url": "https://patchblox.com/security/fix/linux/rlsa-2026-89756",
      "released": "2026-11-07T00:39:51Z"
    },
    {
      "platform": "linux",
      "product": "firefox",
      "release": "rocky 9",
      "fixedVersion": "0:153.5.0-1.el9_8",
      "fix": "RLSA-2026:89757",
      "url": "https://patchblox.com/security/fix/linux/rlsa-2026-89757",
      "released": "2026-11-07T00:39:57Z"
    },
    {
      "platform": "linux",
      "product": "firefox-x11",
      "release": "RHEL 9",
      "fixedVersion": "0:153.5.0-1.el9_8",
      "fix": "RHSA-2026:89757",
      "url": "https://patchblox.com/security/fix/linux/rhsa-2026-89757",
      "released": "2026-10-31T22:20:28Z"
    },
    {
      "platform": "linux",
      "product": "firefox-x11",
      "release": "almalinux 9",
      "fixedVersion": "153.5.0-1.el9_8",
      "fix": "ALSA-2026:89757",
      "url": "https://patchblox.com/security/fix/linux/alsa-2026-89757",
      "released": "2026-11-07T00:40:32Z"
    },
    {
      "platform": "linux",
      "product": "firefox-x11",
      "release": "ol 9",
      "fixedVersion": "0:153.5.0-1.0.1.el9_8",
      "fix": "ELSA-2026-89757",
      "url": "https://patchblox.com/security/fix/linux/elsa-2026-89757",
      "released": "2026-11-07T00:52:27Z"
    },
    {
      "platform": "linux",
      "product": "thunderbird",
      "release": "RHEL 9",
      "fixedVersion": "0:153.5.0-1.el9_8",
      "fix": "RHSA-2026:93443",
      "url": "https://patchblox.com/security/fix/linux/rhsa-2026-93443",
      "released": "2026-11-03T19:00:44Z"
    },
    {
      "platform": "linux",
      "product": "thunderbird",
      "release": "almalinux 9",
      "fixedVersion": "153.5.0-1.el9_8.alma.1",
      "fix": "ALSA-2026:93443",
      "url": "https://patchblox.com/security/fix/linux/alsa-2026-93443",
      "released": "2026-11-07T00:40:32Z"
    },
    {
      "platform": "linux",
      "product": "thunderbird",
      "release": "ol 9",
      "fixedVersion": "0:153.5.0-1.0.1.el9_8",
      "fix": "ELSA-2026-93443",
      "url": "https://patchblox.com/security/fix/linux/elsa-2026-93443",
      "released": "2026-11-07T00:52:27Z"
    },
    {
      "platform": "linux",
      "product": "thunderbird",
      "release": "rocky 9",
      "fixedVersion": "0:153.5.0-1.el9_8",
      "fix": "RLSA-2026:93443",
      "url": "https://patchblox.com/security/fix/linux/rlsa-2026-93443",
      "released": "2026-11-07T00:39:57Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-09T13:31:49Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}