{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "extracted_events": [
              {
                "introduced": "8.0.0"
              },
              {
                "fixed": "8.0.6"
              }
            ],
            "source": [
              "AFFECTED_FIELD",
              "REFERENCES"
            ]
          },
          "events": [
            {
              "introduced": "9956286fb89f9cad9e9f95b99dc751f8666617b7"
            },
            {
              "fixed": "006e21c1ccc38c1c815e7945d54b4638cc5f0de8"
            },
            {
              "fixed": "60a83c62a1dfdfb589b2bad27fb7fc339fc964b7"
            },
            {
              "fixed": "4c28cc1b4ac64f48efdca6ce3e09748227a04a7e"
            }
          ],
          "repo": "https://github.com/oisf/suricata",
          "type": "GIT"
        }
      ]
    }
  ],
  "aliases": [
    "GHSA-gjwr-75gq-877m"
  ],
  "database_specific": {
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
      "CWE-401",
      "CWE-407"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/63xxx/CVE-2026-63446.json"
  },
  "details": "Suricata is a network Intrusion Detection System, Intrusion Prevention System and Network Security Monitoring engine. From 8.0.0 until 8.0.6, AppLayerParserSetTransactionInspectId() in src/app-layer-parser.c uses an inverted guard and marks only already-inspected transactions as inspected. On flows passed by a pass rule or pass-the-flow exception policy, detection is skipped, so completed transactions remain unmarked, are never freed, and are repeatedly rescanned. The per-flow list can grow without bound with quadratic cleanup cost, causing CPU and memory exhaustion. This issue is fixed in version 8.0.6.",
  "id": "CVE-2026-63446",
  "modified": "2026-09-20T11:30:59.521382201Z",
  "published": "2026-09-18T20:22:15.562Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/OISF/suricata/releases/tag/suricata-8.0.6"
    },
    {
      "type": "WEB",
      "url": "https://redmine.openinfosecfoundation.org/issues/8628"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/63xxx/CVE-2026-63446.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/OISF/suricata/security/advisories/GHSA-gjwr-75gq-877m"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-63446"
    },
    {
      "type": "FIX",
      "url": "https://github.com/OISF/suricata/commit/006e21c1ccc38c1c815e7945d54b4638cc5f0de8"
    },
    {
      "type": "FIX",
      "url": "https://github.com/OISF/suricata/commit/60a83c62a1dfdfb589b2bad27fb7fc339fc964b7"
    },
    {
      "type": "FIX",
      "url": "https://github.com/OISF/suricata/pull/15726"
    }
  ],
  "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 app-layer: passed flows can retain transactions, causing resource exhaustion"
}