{
  "cveId": "CVE-2026-76641",
  "url": "https://patchblox.com/security/cve/CVE-2026-76641",
  "summary": "CVE-2026-76641 is fixed in 4 products on 1 platform, first by expat 2.2.5-3ubuntu0.9\u002Besm5, released August 20, 2026. It is not reported as exploited. Patch Radar priority: Routine.",
  "title": "expat: Expat through 2.8.3 contains an out-of-bounds read vulnerability that allows attackers to trigger memory corruption b...",
  "description": "Expat through 2.8.3 contains an out-of-bounds read vulnerability that allows attackers to trigger memory corruption by processing XML with external entity parsers created via XML_ExternalEntityParserCreate. A struct size mismatch between ELEMENT_TYPE members causes storeAtts to read the attIndex member past allocated memory boundaries, resulting in failure to normalize whitespace in non-CDATA attributes or a wild pointer dereference causing a segfault. This vulnerability was introduced by the fix for CVE-2026-66046.",
  "published": "2026-08-20T11:16:00Z",
  "severity": "Medium",
  "epss": 0.00353,
  "epssPercentile": 0.29202,
  "priority": "Routine",
  "priorityTier": 4,
  "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": "expat",
      "release": "Ubuntu 18.04.6 LTS (bionic)",
      "fixedVersion": "2.2.5-3ubuntu0.9\u002Besm5",
      "fix": "expat 2.2.5-3ubuntu0.9\u002Besm5",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-bionic-expat-2.2.5-3ubuntu0.9-esm5",
      "released": "2026-08-20T11:16:00Z"
    },
    {
      "platform": "linux",
      "product": "expat",
      "release": "Ubuntu 20.04 LTS (focal)",
      "fixedVersion": "2.2.9-1ubuntu0.8\u002Besm3",
      "fix": "expat 2.2.9-1ubuntu0.8\u002Besm3",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-focal-expat-2.2.9-1ubuntu0.8-esm3",
      "released": "2026-08-20T11:16:00Z"
    },
    {
      "platform": "linux",
      "product": "expat",
      "release": "Ubuntu 22.04.1 LTS (jammy)",
      "fixedVersion": "2.4.7-1ubuntu0.9",
      "fix": "expat 2.4.7-1ubuntu0.9",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-jammy-expat-2.4.7-1ubuntu0.9",
      "released": "2026-08-20T11:16:00Z"
    },
    {
      "platform": "linux",
      "product": "expat",
      "release": "Ubuntu 24.04.5 LTS (noble)",
      "fixedVersion": "2.6.1-2ubuntu0.6",
      "fix": "expat 2.6.1-2ubuntu0.6",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-noble-expat-2.6.1-2ubuntu0.6",
      "released": "2026-08-20T11:16:00Z"
    },
    {
      "platform": "linux",
      "product": "expat",
      "release": "Ubuntu 26.04.1 LTS (resolute)",
      "fixedVersion": "2.7.4-1ubuntu0.2",
      "fix": "expat 2.7.4-1ubuntu0.2",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-resolute-expat-2.7.4-1ubuntu0.2",
      "released": "2026-08-20T11:16:00Z"
    },
    {
      "platform": "linux",
      "product": "expat",
      "release": "opensuse-leap 16.0",
      "fixedVersion": "2.8.4-160000.1.1",
      "fix": "OPENSUSE-SU-2026:21945-1",
      "url": "https://patchblox.com/security/fix/linux/opensuse-su-2026-21945-1",
      "released": "2026-09-24T07:03:56Z"
    },
    {
      "platform": "linux",
      "product": "expat",
      "release": "sles 15.6",
      "fixedVersion": "2.8.5-150400.3.40.1",
      "fix": "SUSE-SU-2026:4623-1",
      "url": "https://patchblox.com/security/fix/linux/suse-su-2026-4623-1",
      "released": "2026-11-07T00:41:11Z"
    },
    {
      "platform": "linux",
      "product": "expat",
      "release": "sles 15.7",
      "fixedVersion": "2.8.5-150700.3.15.1",
      "fix": "SUSE-SU-2026:4619-1",
      "url": "https://patchblox.com/security/fix/linux/suse-su-2026-4619-1",
      "released": "2026-11-07T00:43:02Z"
    },
    {
      "platform": "linux",
      "product": "expat",
      "release": "sles 16.0",
      "fixedVersion": "2.8.4-160000.1.1",
      "fix": "SUSE-SU-2026:23912-1",
      "url": "https://patchblox.com/security/fix/linux/suse-su-2026-23912-1",
      "released": "2026-09-24T07:07:13Z"
    },
    {
      "platform": "linux",
      "product": "libexpat1",
      "release": "Ubuntu 18.04.6 LTS (bionic)",
      "fixedVersion": "2.2.5-3ubuntu0.9\u002Besm5",
      "fix": "libexpat1 2.2.5-3ubuntu0.9\u002Besm5",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-bionic-libexpat1-2.2.5-3ubuntu0.9-esm5",
      "released": "2026-08-20T11:16:00Z"
    },
    {
      "platform": "linux",
      "product": "libexpat1",
      "release": "Ubuntu 20.04 LTS (focal)",
      "fixedVersion": "2.2.9-1ubuntu0.8\u002Besm3",
      "fix": "libexpat1 2.2.9-1ubuntu0.8\u002Besm3",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-focal-libexpat1-2.2.9-1ubuntu0.8-esm3",
      "released": "2026-08-20T11:16:00Z"
    },
    {
      "platform": "linux",
      "product": "libexpat1",
      "release": "Ubuntu 22.04.1 LTS (jammy)",
      "fixedVersion": "2.4.7-1ubuntu0.9",
      "fix": "libexpat1 2.4.7-1ubuntu0.9",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-jammy-libexpat1-2.4.7-1ubuntu0.9",
      "released": "2026-08-20T11:16:00Z"
    },
    {
      "platform": "linux",
      "product": "libexpat1",
      "release": "Ubuntu 24.04.5 LTS (noble)",
      "fixedVersion": "2.6.1-2ubuntu0.6",
      "fix": "libexpat1 2.6.1-2ubuntu0.6",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-noble-libexpat1-2.6.1-2ubuntu0.6",
      "released": "2026-08-20T11:16:00Z"
    },
    {
      "platform": "linux",
      "product": "libexpat1",
      "release": "Ubuntu 26.04.1 LTS (resolute)",
      "fixedVersion": "2.7.4-1ubuntu0.2",
      "fix": "libexpat1 2.7.4-1ubuntu0.2",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-resolute-libexpat1-2.7.4-1ubuntu0.2",
      "released": "2026-08-20T11:16:00Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-08T00:53:09Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}