{
  "cveId": "CVE-2026-117883",
  "url": "https://patchblox.com/security/cve/CVE-2026-117883",
  "summary": "CVE-2026-117883 is fixed in 4 products on 1 platform, first by DEBIAN-CVE-2026-117883, released October 29, 2026. It is not reported as exploited. Patch Radar priority: High.",
  "title": "firefox-esr: Use-after-free in the DOM: HTML Parser component",
  "description": "Use-after-free in the DOM: HTML Parser component. This vulnerability was fixed in Firefox 159, Firefox ESR 115.44, Firefox ESR 153.6, Thunderbird 159, and Thunderbird 153.6.",
  "published": "2026-10-27T14:16:43Z",
  "severity": "high",
  "cvss": 8.8,
  "cvssVector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H",
  "epss": 0.00397,
  "epssPercentile": 0.34179,
  "priority": "High",
  "priorityTier": 3,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
    {
      "platform": "linux",
      "product": "firefox",
      "release": "ol 10",
      "fixedVersion": "0:153.6.0-1.0.1.el10_2",
      "fix": "ELSA-2026-93956",
      "url": "https://patchblox.com/security/fix/linux/elsa-2026-93956",
      "released": "2026-11-07T00:59:15Z"
    },
    {
      "platform": "linux",
      "product": "firefox",
      "release": "ol 8",
      "fixedVersion": "0:153.6.0-1.0.1.el8_10",
      "fix": "ELSA-2026-94405",
      "url": "https://patchblox.com/security/fix/linux/elsa-2026-94405",
      "released": "2026-11-07T00:48:28Z"
    },
    {
      "platform": "linux",
      "product": "firefox",
      "release": "ol 9",
      "fixedVersion": "0:153.6.0-1.0.1.el9_8",
      "fix": "ELSA-2026-93957",
      "url": "https://patchblox.com/security/fix/linux/elsa-2026-93957",
      "released": "2026-11-07T00:50:51Z"
    },
    {
      "platform": "linux",
      "product": "firefox-esr",
      "release": "Debian 12.15 (bookworm)",
      "fixedVersion": "153.6.0esr-1~deb12u2",
      "fix": "DEBIAN-CVE-2026-117883",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-117883",
      "released": "2026-10-29T21:38:00Z"
    },
    {
      "platform": "linux",
      "product": "firefox-esr",
      "release": "Debian 13.5 (trixie)",
      "fixedVersion": "153.6.0esr-1~deb13u1",
      "fix": "DEBIAN-CVE-2026-117883",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-117883",
      "released": "2026-10-29T21:38:00Z"
    },
    {
      "platform": "linux",
      "product": "firefox-x11",
      "release": "ol 9",
      "fixedVersion": "0:153.6.0-1.0.1.el9_8",
      "fix": "ELSA-2026-93957",
      "url": "https://patchblox.com/security/fix/linux/elsa-2026-93957",
      "released": "2026-11-07T00:50:51Z"
    },
    {
      "platform": "linux",
      "product": "thunderbird",
      "release": "Debian 12.15 (bookworm)",
      "fixedVersion": "1:153.6.0esr-1~deb12u2",
      "fix": "DEBIAN-CVE-2026-117883",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-117883",
      "released": "2026-10-29T21:38:00Z"
    },
    {
      "platform": "linux",
      "product": "thunderbird",
      "release": "Debian 13.5 (trixie)",
      "fixedVersion": "1:153.6.0esr-1~deb13u1",
      "fix": "DEBIAN-CVE-2026-117883",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-117883",
      "released": "2026-10-29T21:38:00Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-08T19:12:23Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}