{
  "cveId": "CVE-2026-33721",
  "url": "https://patchblox.com/security/cve/CVE-2026-33721",
  "summary": "CVE-2026-33721 is fixed in mapserver on 1 platform, first by DEBIAN-CVE-2026-33721, released March 27, 2026. It is not reported as exploited. Patch Radar priority: High.",
  "title": "mapserver: MapServer is a system for developing web-based GIS applications",
  "description": "MapServer is a system for developing web-based GIS applications. Starting in version 4.2 and prior to version 8.6.1, a heap-buffer-overflow write in MapServer\u2019s SLD (Styled Layer Descriptor) parser lets a remote, unauthenticated attacker crash the MapServer process by sending a crafted SLD with more than 100 Threshold elements inside a ColorMap/Categorize structure (commonly reachable via WMS GetMap with SLD_BODY). Version 8.6.1 patches the issue.",
  "published": "2026-03-27T01:16:19Z",
  "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": 0.0122,
  "epssPercentile": 0.68866,
  "priority": "High",
  "priorityTier": 3,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
    {
      "platform": "linux",
      "product": "mapserver",
      "release": "Debian 12.15 (bookworm)",
      "fixedVersion": "8.0.0-3\u002Bdeb12u1",
      "fix": "DEBIAN-CVE-2026-33721",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-33721",
      "released": "2026-03-27T01:16:19Z"
    },
    {
      "platform": "linux",
      "product": "mapserver",
      "release": "Debian 13.5 (trixie)",
      "fixedVersion": "8.4.0-4\u002Bdeb13u2",
      "fix": "DEBIAN-CVE-2026-33721",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-33721",
      "released": "2026-03-27T01:16:19Z"
    },
    {
      "platform": "linux",
      "product": "mapserver",
      "release": "Debian 14",
      "fixedVersion": "8.6.1-1",
      "fix": "DEBIAN-CVE-2026-33721",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-33721",
      "released": "2026-03-27T01:16:19Z"
    },
    {
      "platform": "linux",
      "product": "mapserver",
      "release": "opensuse-leap 16.0",
      "fixedVersion": "8.6.1-bp160.1.1",
      "fix": "OPENSUSE-SU-2026:20476-1",
      "url": "https://patchblox.com/security/fix/linux/opensuse-su-2026-20476-1",
      "released": "2026-11-07T00:47:19Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-08T19:12:23Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}