{
  "cveId": "CVE-2026-76781",
  "url": "https://patchblox.com/security/cve/CVE-2026-76781",
  "summary": "CVE-2026-76781 is fixed in 11 products on 1 platform, first by libxml2-16 2.15.2\u002Bdfsg-0.1ubuntu0.3, released September 17, 2026. It is not reported as exploited. Patch Radar priority: Routine.",
  "title": "libxml2: A flaw was found in libxml2",
  "description": "A flaw was found in libxml2. A local user or an attacker providing a specially crafted XML catalog can trigger a NULL pointer dereference during XML catalog parsing. This occurs when a \u0060nextCatalog\u0060 element lacks its mandatory \u0060catalog\u0060 attribute, leading to the application crashing and causing a Denial of Service (DoS).",
  "published": "2026-09-17T09:17:00Z",
  "severity": "Medium",
  "cvss": 5.5,
  "cvssVector": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H",
  "epss": 0.00157,
  "epssPercentile": 0.04929,
  "priority": "Routine",
  "priorityTier": 4,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
    {
      "platform": "linux",
      "product": "libxml2",
      "release": "Debian 14",
      "fixedVersion": "2.15.4\u002Bdfsg-1",
      "fix": "DEBIAN-CVE-2026-76781",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-76781",
      "released": "2026-09-20T18:42:59Z"
    },
    {
      "platform": "linux",
      "product": "libxml2",
      "release": "Ubuntu 18.04.6 LTS (bionic)",
      "fixedVersion": "2.9.4\u002Bdfsg1-6.1ubuntu1.9\u002Besm9",
      "fix": "libxml2 2.9.4\u002Bdfsg1-6.1ubuntu1.9\u002Besm9",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-bionic-libxml2-2.9.4-dfsg1-6.1ubuntu1.9-esm9",
      "released": "2026-10-09T22:35:50Z"
    },
    {
      "platform": "linux",
      "product": "libxml2",
      "release": "Ubuntu 20.04 LTS (focal)",
      "fixedVersion": "2.9.10\u002Bdfsg-5ubuntu0.20.04.10\u002Besm6",
      "fix": "libxml2 2.9.10\u002Bdfsg-5ubuntu0.20.04.10\u002Besm6",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-focal-libxml2-2.9.10-dfsg-5ubuntu0.20.04.10-esm6",
      "released": "2026-10-09T22:35:56Z"
    },
    {
      "platform": "linux",
      "product": "libxml2",
      "release": "Ubuntu 22.04.1 LTS (jammy)",
      "fixedVersion": "2.9.13\u002Bdfsg-1ubuntu0.14",
      "fix": "libxml2 2.9.13\u002Bdfsg-1ubuntu0.14",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-jammy-libxml2-2.9.13-dfsg-1ubuntu0.14",
      "released": "2026-10-09T22:35:58Z"
    },
    {
      "platform": "linux",
      "product": "libxml2",
      "release": "Ubuntu 24.04.5 LTS (noble)",
      "fixedVersion": "2.9.14\u002Bdfsg-1.3ubuntu3.10",
      "fix": "libxml2 2.9.14\u002Bdfsg-1.3ubuntu3.10",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-noble-libxml2-2.9.14-dfsg-1.3ubuntu3.10",
      "released": "2026-10-09T22:36:01Z"
    },
    {
      "platform": "linux",
      "product": "libxml2",
      "release": "amzn 2023",
      "fixedVersion": "2.10.4-1.amzn2023.0.22",
      "fix": "ALAS2023-2026-3341",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-3341",
      "released": "2026-11-07T01:06:52Z"
    },
    {
      "platform": "linux",
      "product": "libxml2-16",
      "release": "Ubuntu 26.04.1 LTS (resolute)",
      "fixedVersion": "2.15.2\u002Bdfsg-0.1ubuntu0.3",
      "fix": "libxml2-16 2.15.2\u002Bdfsg-0.1ubuntu0.3",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-resolute-libxml2-16-2.15.2-dfsg-0.1ubuntu0.3",
      "released": "2026-09-17T09:17:00Z"
    },
    {
      "platform": "linux",
      "product": "libxml2-debuginfo",
      "release": "amzn 2023",
      "fixedVersion": "2.10.4-1.amzn2023.0.22",
      "fix": "ALAS2023-2026-3341",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-3341",
      "released": "2026-11-07T01:06:52Z"
    },
    {
      "platform": "linux",
      "product": "libxml2-debugsource",
      "release": "amzn 2023",
      "fixedVersion": "2.10.4-1.amzn2023.0.22",
      "fix": "ALAS2023-2026-3341",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-3341",
      "released": "2026-11-07T01:06:52Z"
    },
    {
      "platform": "linux",
      "product": "libxml2-devel",
      "release": "amzn 2023",
      "fixedVersion": "2.10.4-1.amzn2023.0.22",
      "fix": "ALAS2023-2026-3341",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-3341",
      "released": "2026-11-07T01:06:52Z"
    },
    {
      "platform": "linux",
      "product": "libxml2-source",
      "release": "Ubuntu 26.04.1 LTS (resolute)",
      "fixedVersion": "2.15.2\u002Bdfsg-0.1ubuntu0.3",
      "fix": "libxml2-source 2.15.2\u002Bdfsg-0.1ubuntu0.3",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-resolute-libxml2-source-2.15.2-dfsg-0.1ubuntu0.3",
      "released": "2026-09-17T09:17:00Z"
    },
    {
      "platform": "linux",
      "product": "libxml2-static",
      "release": "amzn 2023",
      "fixedVersion": "2.10.4-1.amzn2023.0.22",
      "fix": "ALAS2023-2026-3341",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-3341",
      "released": "2026-11-07T01:06:52Z"
    },
    {
      "platform": "linux",
      "product": "libxml2-utils",
      "release": "Ubuntu 18.04.6 LTS (bionic)",
      "fixedVersion": "2.9.4\u002Bdfsg1-6.1ubuntu1.9\u002Besm9",
      "fix": "libxml2-utils 2.9.4\u002Bdfsg1-6.1ubuntu1.9\u002Besm9",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-bionic-libxml2-utils-2.9.4-dfsg1-6.1ubuntu1.9-esm9",
      "released": "2026-10-09T22:35:50Z"
    },
    {
      "platform": "linux",
      "product": "libxml2-utils",
      "release": "Ubuntu 20.04 LTS (focal)",
      "fixedVersion": "2.9.10\u002Bdfsg-5ubuntu0.20.04.10\u002Besm6",
      "fix": "libxml2-utils 2.9.10\u002Bdfsg-5ubuntu0.20.04.10\u002Besm6",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-focal-libxml2-utils-2.9.10-dfsg-5ubuntu0.20.04.10-esm6",
      "released": "2026-10-09T22:35:56Z"
    },
    {
      "platform": "linux",
      "product": "libxml2-utils",
      "release": "Ubuntu 22.04.1 LTS (jammy)",
      "fixedVersion": "2.9.13\u002Bdfsg-1ubuntu0.14",
      "fix": "libxml2-utils 2.9.13\u002Bdfsg-1ubuntu0.14",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-jammy-libxml2-utils-2.9.13-dfsg-1ubuntu0.14",
      "released": "2026-10-09T22:35:58Z"
    },
    {
      "platform": "linux",
      "product": "libxml2-utils",
      "release": "Ubuntu 24.04.5 LTS (noble)",
      "fixedVersion": "2.9.14\u002Bdfsg-1.3ubuntu3.10",
      "fix": "libxml2-utils 2.9.14\u002Bdfsg-1.3ubuntu3.10",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-noble-libxml2-utils-2.9.14-dfsg-1.3ubuntu3.10",
      "released": "2026-10-09T22:36:01Z"
    },
    {
      "platform": "linux",
      "product": "libxml2-utils",
      "release": "Ubuntu 26.04.1 LTS (resolute)",
      "fixedVersion": "2.15.2\u002Bdfsg-0.1ubuntu0.3",
      "fix": "libxml2-utils 2.15.2\u002Bdfsg-0.1ubuntu0.3",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-resolute-libxml2-utils-2.15.2-dfsg-0.1ubuntu0.3",
      "released": "2026-09-17T09:17:00Z"
    },
    {
      "platform": "linux",
      "product": "python-libxml2",
      "release": "Ubuntu 18.04.6 LTS (bionic)",
      "fixedVersion": "2.9.4\u002Bdfsg1-6.1ubuntu1.9\u002Besm9",
      "fix": "python-libxml2 2.9.4\u002Bdfsg1-6.1ubuntu1.9\u002Besm9",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-bionic-python-libxml2-2.9.4-dfsg1-6.1ubuntu1.9-esm9",
      "released": "2026-10-09T22:35:50Z"
    },
    {
      "platform": "linux",
      "product": "python-libxml2",
      "release": "Ubuntu 20.04 LTS (focal)",
      "fixedVersion": "2.9.10\u002Bdfsg-5ubuntu0.20.04.10\u002Besm6",
      "fix": "python-libxml2 2.9.10\u002Bdfsg-5ubuntu0.20.04.10\u002Besm6",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-focal-python-libxml2-2.9.10-dfsg-5ubuntu0.20.04.10-esm6",
      "released": "2026-10-09T22:35:56Z"
    },
    {
      "platform": "linux",
      "product": "python3-libxml2",
      "release": "Ubuntu 18.04.6 LTS (bionic)",
      "fixedVersion": "2.9.4\u002Bdfsg1-6.1ubuntu1.9\u002Besm9",
      "fix": "python3-libxml2 2.9.4\u002Bdfsg1-6.1ubuntu1.9\u002Besm9",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-bionic-python3-libxml2-2.9.4-dfsg1-6.1ubuntu1.9-esm9",
      "released": "2026-10-09T22:35:50Z"
    },
    {
      "platform": "linux",
      "product": "python3-libxml2",
      "release": "Ubuntu 20.04 LTS (focal)",
      "fixedVersion": "2.9.10\u002Bdfsg-5ubuntu0.20.04.10\u002Besm6",
      "fix": "python3-libxml2 2.9.10\u002Bdfsg-5ubuntu0.20.04.10\u002Besm6",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-focal-python3-libxml2-2.9.10-dfsg-5ubuntu0.20.04.10-esm6",
      "released": "2026-10-09T22:35:56Z"
    },
    {
      "platform": "linux",
      "product": "python3-libxml2",
      "release": "Ubuntu 22.04.1 LTS (jammy)",
      "fixedVersion": "2.9.13\u002Bdfsg-1ubuntu0.14",
      "fix": "python3-libxml2 2.9.13\u002Bdfsg-1ubuntu0.14",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-jammy-python3-libxml2-2.9.13-dfsg-1ubuntu0.14",
      "released": "2026-10-09T22:35:58Z"
    },
    {
      "platform": "linux",
      "product": "python3-libxml2",
      "release": "Ubuntu 24.04.5 LTS (noble)",
      "fixedVersion": "2.9.14\u002Bdfsg-1.3ubuntu3.10",
      "fix": "python3-libxml2 2.9.14\u002Bdfsg-1.3ubuntu3.10",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-noble-python3-libxml2-2.9.14-dfsg-1.3ubuntu3.10",
      "released": "2026-10-09T22:36:01Z"
    },
    {
      "platform": "linux",
      "product": "python3-libxml2",
      "release": "Ubuntu 26.04.1 LTS (resolute)",
      "fixedVersion": "2.15.2\u002Bdfsg-0.1ubuntu0.3",
      "fix": "python3-libxml2 2.15.2\u002Bdfsg-0.1ubuntu0.3",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-resolute-python3-libxml2-2.15.2-dfsg-0.1ubuntu0.3",
      "released": "2026-09-17T09:17:00Z"
    },
    {
      "platform": "linux",
      "product": "python3-libxml2",
      "release": "amzn 2023",
      "fixedVersion": "2.10.4-1.amzn2023.0.22",
      "fix": "ALAS2023-2026-3341",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-3341",
      "released": "2026-11-07T01:06:52Z"
    },
    {
      "platform": "linux",
      "product": "python3-libxml2-debuginfo",
      "release": "amzn 2023",
      "fixedVersion": "2.10.4-1.amzn2023.0.22",
      "fix": "ALAS2023-2026-3341",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-3341",
      "released": "2026-11-07T01:06:52Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-09T07:25:28Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}