{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "extracted_events": [
              {
                "introduced": "8.0.5"
              },
              {
                "fixed": "8.0.6"
              }
            ],
            "source": [
              "AFFECTED_FIELD",
              "REFERENCES"
            ]
          },
          "events": [
            {
              "introduced": "5611b60c6172fe4204cd69a9c9d466b6632dd0c7"
            },
            {
              "fixed": "15bf91c5ccbbbf640cd042e1c96974b262549385"
            },
            {
              "fixed": "82c41905589305e8389ceb793907ccb74798aee5"
            },
            {
              "fixed": "4c28cc1b4ac64f48efdca6ce3e09748227a04a7e"
            }
          ],
          "repo": "https://github.com/oisf/suricata",
          "type": "GIT"
        }
      ]
    }
  ],
  "aliases": [
    "GHSA-w394-3g33-3jg9"
  ],
  "database_specific": {
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
      "CWE-407"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/63xxx/CVE-2026-63447.json"
  },
  "details": "Suricata is a network Intrusion Detection System, Intrusion Prevention System and Network Security Monitoring engine. From 8.0.5 until 8.0.6, the FTP parser in src/app-layer-ftp.c can continue allocating transactions after app-layer.protocols.ftp.max-tx is reached while processing one large chunk of FTP command data. The oversized transaction list is repeatedly processed with quadratic complexity after the too_many_transactions event, allowing crafted FTP traffic to degrade packet processing, reduce monitoring visibility, or cause denial of service. This issue is fixed in version 8.0.6.",
  "id": "CVE-2026-63447",
  "modified": "2026-09-20T11:30:24.998162296Z",
  "published": "2026-09-18T20:21:06.510Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/OISF/suricata/releases/tag/suricata-8.0.6"
    },
    {
      "type": "WEB",
      "url": "https://redmine.openinfosecfoundation.org/issues/8592"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/63xxx/CVE-2026-63447.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/OISF/suricata/security/advisories/GHSA-w394-3g33-3jg9"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-63447"
    },
    {
      "type": "FIX",
      "url": "https://github.com/OISF/suricata/commit/15bf91c5ccbbbf640cd042e1c96974b262549385"
    },
    {
      "type": "FIX",
      "url": "https://github.com/OISF/suricata/commit/82c41905589305e8389ceb793907ccb74798aee5"
    }
  ],
  "schema_version": "1.9.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Suricata ftp: crafted FTP traffic can cause quadratic CPU consumption"
}