{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "extracted_events": [
              {
                "introduced": "8.0.0"
              },
              {
                "fixed": "8.0.5"
              },
              {
                "introduced": "0"
              },
              {
                "fixed": "7.0.16"
              }
            ],
            "source": "AFFECTED_FIELD"
          },
          "events": [
            {
              "introduced": "9956286fb89f9cad9e9f95b99dc751f8666617b7"
            },
            {
              "fixed": "5611b60c6172fe4204cd69a9c9d466b6632dd0c7"
            },
            {
              "introduced": "0"
            },
            {
              "fixed": "534864353e8d6e5d50991546f96e33f547879aec"
            }
          ],
          "repo": "https://github.com/oisf/suricata",
          "type": "GIT"
        }
      ]
    }
  ],
  "aliases": [
    "GHSA-r74x-74x5-r9vm"
  ],
  "database_specific": {
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
      "CWE-122"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/45xxx/CVE-2026-45761.json"
  },
  "details": "Suricata is a network Intrusion Detection System, Intrusion Prevention System and Network Security Monitoring engine. Prior to versions 7.0.16 and 8.0.5, a crafted rule using mixed-case frame syntax could trigger a heap buffer overflow while Suricata is loading signatures. The issue is reached during rule parsing/loading rather than by network traffic alone. Versions 7.0.16 and 8.0.5 contain a fix. As a workaround, preprocess rules to check that frames are all lowercase and/or only load trusted rulesets.",
  "id": "CVE-2026-45761",
  "modified": "2026-09-12T03:30:37.640374589Z",
  "published": "2026-09-10T21:02:48.129Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://forum.suricata.io/t/suricata-8-0-5-and-7-0-16-released/6315"
    },
    {
      "type": "WEB",
      "url": "https://redmine.openinfosecfoundation.org/issues/8526"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/45xxx/CVE-2026-45761.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/OISF/suricata/security/advisories/GHSA-r74x-74x5-r9vm"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-45761"
    }
  ],
  "schema_version": "1.9.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Suricata detect: case-insensitive frame handling can cause heap buffer overflow during rule load"
}