{
  "cveId": "CVE-2026-93990",
  "url": "https://patchblox.com/security/cve/CVE-2026-93990",
  "summary": "CVE-2026-93990 is fixed in 7 products on 1 platform, first by DEBIAN-CVE-2026-93990, released September 26, 2026. It is not reported as exploited. Patch Radar priority: High.",
  "title": "Expat through 2.8.4 Malformed UTF-16 Acceptance via Unchecked Surrogate",
  "description": "Expat is a C library for parsing XML documents.  \n\nSecurity Fix(es):  \n\n  * expat: Expat: Denial of Service via quadratic complexity in attribute processing (CVE-2026-66046)\n  * expat: Expat: XML Injection via Malformed UTF-16 Input (CVE-2026-93990)\n\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": "2026-09-19T22:58:11Z",
  "severity": "Important",
  "cvss": 7.5,
  "cvssVector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
  "cwe": "Improper Handling of Unicode Encoding",
  "epss": 0.00403,
  "epssPercentile": 0.34853,
  "priority": "High",
  "priorityTier": 3,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "vendorAdvisory": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-93990",
  "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": "expat",
      "release": "Debian 12.15 (bookworm)",
      "fixedVersion": "2.5.0-1\u002Bdeb12u4",
      "fix": "DEBIAN-CVE-2026-93990",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-93990",
      "released": "2026-09-26T19:52:05Z"
    },
    {
      "platform": "linux",
      "product": "expat",
      "release": "Debian 13.5 (trixie)",
      "fixedVersion": "2.9.0-1~deb13u1",
      "fix": "DEBIAN-CVE-2026-93990",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-93990",
      "released": "2026-09-26T19:52:05Z"
    },
    {
      "platform": "linux",
      "product": "expat",
      "release": "Debian 14",
      "fixedVersion": "2.8.4-2",
      "fix": "DEBIAN-CVE-2026-93990",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-93990",
      "released": "2026-09-26T19:52:05Z"
    },
    {
      "platform": "linux",
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      "release": "RHEL 10",
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      "fix": "RHSA-2026:74001",
      "url": "https://patchblox.com/security/fix/linux/rhsa-2026-74001",
      "released": "2026-10-01T20:54:27Z"
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    {
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      "fix": "RHSA-2026:72448",
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      "released": "2026-09-29T20:27:12Z"
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      "released": "2026-09-29T20:28:38Z"
    },
    {
      "platform": "linux",
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      "released": "2026-09-28T00:00:00Z"
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    {
      "platform": "linux",
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      "released": "2026-10-01T00:00:00Z"
    },
    {
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      "fix": "ELSA-2026-72448",
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      "released": "2026-09-29T00:00:00Z"
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    {
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      "fix": "ELSA-2026-72663",
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      "released": "2026-09-28T00:00:00Z"
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    {
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      "release": "opensuse-leap 16.0",
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      "fix": "OPENSUSE-SU-2026:22177-1",
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      "released": "2026-11-07T00:47:19Z"
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    {
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      "url": "https://patchblox.com/security/fix/linux/rlsa-2026-74001",
      "released": "2026-10-01T12:08:49Z"
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    {
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      "fix": "RLSA-2026:72448",
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      "released": "2026-09-29T06:01:09Z"
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      "fix": "RLSA-2026:72663",
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      "released": "2026-09-30T12:05:19Z"
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    {
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      "released": "2026-11-07T00:41:11Z"
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      "released": "2026-11-07T00:43:02Z"
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      "released": "2026-11-07T00:44:01Z"
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      "fix": "ALSA-2026:72663",
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      "released": "2026-11-07T01:06:07Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-09T01:18:40Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}