{
  "cveId": "CVE-2023-42821",
  "url": "https://patchblox.com/security/cve/CVE-2023-42821",
  "summary": "CVE-2023-42821 is fixed in golang-github-gomarkdown-markdown on 1 platform, first by DEBIAN-CVE-2023-42821, released September 22, 2023. It is not reported as exploited. Patch Radar priority: High.",
  "title": "golang-github-gomarkdown-markdown: The package \u0060github.com/gomarkdown/markdown\u0060 is a Go library for parsing Markdown text and rendering as HTML",
  "description": "The package \u0060github.com/gomarkdown/markdown\u0060 is a Go library for parsing Markdown text and rendering as HTML. Prior to pseudoversion \u00600.0.0-20230922105210-14b16010c2ee\u0060, which corresponds with commit \u006014b16010c2ee7ff33a940a541d993bd043a88940\u0060, parsing malformed markdown input with parser that uses parser.Mmark extension could result in out-of-bounds read vulnerability. To exploit the vulnerability, parser needs to have \u0060parser.Mmark\u0060 extension set. The panic occurs inside the \u0060citation.go\u0060 file on the line 69 when the parser tries to access the element past its length. This can result in a denial of service. Commit \u006014b16010c2ee7ff33a940a541d993bd043a88940\u0060/pseudoversion \u00600.0.0-20230922105210-14b16010c2ee\u0060 contains a patch for this issue.",
  "published": "2023-09-22T17:15:14Z",
  "severity": "high",
  "cvss": 7.5,
  "cvssVector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
  "epss": 0.01252,
  "epssPercentile": 0.69635,
  "priority": "High",
  "priorityTier": 3,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
    {
      "platform": "linux",
      "product": "golang-github-gomarkdown-markdown",
      "release": "Debian 13.5 (trixie)",
      "fixedVersion": "0.0~git20231115.a660076-1",
      "fix": "DEBIAN-CVE-2023-42821",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2023-42821",
      "released": "2023-09-22T17:15:14Z"
    },
    {
      "platform": "linux",
      "product": "golang-github-gomarkdown-markdown",
      "release": "Debian 14",
      "fixedVersion": "0.0~git20231115.a660076-1",
      "fix": "DEBIAN-CVE-2023-42821",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2023-42821",
      "released": "2023-09-22T17:15:14Z"
    }
  ],
  "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"
  }
}