{
  "cveId": "CVE-2018-20843",
  "url": "https://patchblox.com/security/cve/CVE-2018-20843",
  "summary": "CVE-2018-20843 is fixed in 7 products on 1 platform, first by expat 2.2.5-3ubuntu0.1, released June 23, 2019. It is not reported as exploited. Patch Radar priority: High.",
  "title": "expat: In libexpat in Expat before 2.2.7, XML input including XML names thatcontain a large number of colons could make the...",
  "description": "In libexpat in Expat before 2.2.7, XML input including XML names thatcontain a large number of colons could make the XML parser consume a highamount of RAM and CPU resources while processing (enough to be usable fordenial-of-service attacks).",
  "published": "2019-06-23T17:00:00Z",
  "severity": "Low",
  "cvss": 7.5,
  "epss": 0.07107,
  "epssPercentile": 0.94279,
  "priority": "High",
  "priorityTier": 3,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
    {
      "platform": "linux",
      "product": "expat",
      "release": "RHEL 8",
      "fixedVersion": "0:2.2.5-4.el8",
      "fix": "RHSA-2020:4484",
      "url": "https://patchblox.com/security/fix/linux/rhsa-2020-4484",
      "released": "2020-11-04T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "expat",
      "release": "Ubuntu 18.04.6 LTS (bionic)",
      "fixedVersion": "2.2.5-3ubuntu0.1",
      "fix": "expat 2.2.5-3ubuntu0.1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-bionic-expat-2.2.5-3ubuntu0.1",
      "released": "2019-06-23T17:00:00Z"
    },
    {
      "platform": "linux",
      "product": "expat",
      "release": "Ubuntu 24.10 (oracular)",
      "fixedVersion": "2.2.6-2",
      "fix": "expat 2.2.6-2",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-oracular-expat-2.2.6-2",
      "released": "2019-06-24T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "expat",
      "release": "Ubuntu 25.04 (plucky)",
      "fixedVersion": "2.2.6-2",
      "fix": "expat 2.2.6-2",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-plucky-expat-2.2.6-2",
      "released": "2019-06-24T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "expat",
      "release": "ol 8",
      "fixedVersion": "0:2.2.5-4.el8",
      "fix": "ELSA-2020-4484",
      "url": "https://patchblox.com/security/fix/linux/elsa-2020-4484",
      "released": "2020-11-10T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "expat-devel",
      "release": "RHEL 8",
      "fixedVersion": "0:2.2.5-4.el8",
      "fix": "RHSA-2020:4484",
      "url": "https://patchblox.com/security/fix/linux/rhsa-2020-4484",
      "released": "2020-11-04T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "expat-devel",
      "release": "ol 8",
      "fixedVersion": "0:2.2.5-4.el8",
      "fix": "ELSA-2020-4484",
      "url": "https://patchblox.com/security/fix/linux/elsa-2020-4484",
      "released": "2020-11-10T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "libexpat1",
      "release": "Ubuntu 18.04.6 LTS (bionic)",
      "fixedVersion": "2.2.5-3ubuntu0.1",
      "fix": "libexpat1 2.2.5-3ubuntu0.1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-bionic-libexpat1-2.2.5-3ubuntu0.1",
      "released": "2019-06-23T17:00:00Z"
    },
    {
      "platform": "linux",
      "product": "libexpat1",
      "release": "Ubuntu 24.10 (oracular)",
      "fixedVersion": "2.2.6-2",
      "fix": "libexpat1 2.2.6-2",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-oracular-libexpat1-2.2.6-2",
      "released": "2019-06-24T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "libexpat1",
      "release": "Ubuntu 25.04 (plucky)",
      "fixedVersion": "2.2.6-2",
      "fix": "libexpat1 2.2.6-2",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-plucky-libexpat1-2.2.6-2",
      "released": "2019-06-24T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "libxmltok1",
      "release": "Ubuntu 18.04.6 LTS (bionic)",
      "fixedVersion": "1.2-4ubuntu0.18.04.1~esm4",
      "fix": "libxmltok1 1.2-4ubuntu0.18.04.1~esm4",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-bionic-libxmltok1-1.2-4ubuntu0.18.04.1-esm4",
      "released": "2022-01-10T06:12:00Z"
    },
    {
      "platform": "linux",
      "product": "libxmltok1",
      "release": "Ubuntu 20.04 LTS (focal)",
      "fixedVersion": "1.2-4ubuntu0.20.04.1~esm4",
      "fix": "libxmltok1 1.2-4ubuntu0.20.04.1~esm4",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-focal-libxmltok1-1.2-4ubuntu0.20.04.1-esm4",
      "released": "2022-01-10T06:12:00Z"
    },
    {
      "platform": "linux",
      "product": "libxmltok1",
      "release": "Ubuntu 22.04.1 LTS (jammy)",
      "fixedVersion": "1.2-4ubuntu0.22.04.1~esm4",
      "fix": "libxmltok1 1.2-4ubuntu0.22.04.1~esm4",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-jammy-libxmltok1-1.2-4ubuntu0.22.04.1-esm4",
      "released": "2022-01-10T06:12:00Z"
    },
    {
      "platform": "linux",
      "product": "libxmltok1t64",
      "release": "Ubuntu 24.04.5 LTS (noble)",
      "fixedVersion": "1.2-4.1ubuntu2.24.0.4.1\u002Besm2",
      "fix": "libxmltok1t64 1.2-4.1ubuntu2.24.0.4.1\u002Besm2",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-noble-libxmltok1t64-1.2-4.1ubuntu2.24.0.4.1-esm2",
      "released": "2022-01-10T06:12:00Z"
    },
    {
      "platform": "linux",
      "product": "libxmltok1t64",
      "release": "Ubuntu 24.10 (oracular)",
      "fixedVersion": "1.2-4.1ubuntu3.1",
      "fix": "libxmltok1t64 1.2-4.1ubuntu3.1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-oracular-libxmltok1t64-1.2-4.1ubuntu3.1",
      "released": "2019-09-04T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "mingw32-expat",
      "release": "RHEL 8",
      "fixedVersion": "0:2.2.4-5.el8",
      "fix": "RHSA-2020:4846",
      "url": "https://patchblox.com/security/fix/linux/rhsa-2020-4846",
      "released": "2020-11-04T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "mingw64-expat",
      "release": "RHEL 8",
      "fixedVersion": "0:2.2.4-5.el8",
      "fix": "RHSA-2020:4846",
      "url": "https://patchblox.com/security/fix/linux/rhsa-2020-4846",
      "released": "2020-11-04T00:00:00Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-07T18:46:35Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}