Suricata http2: protocol-change type confusion can lead to denial of service

{
  "id": "7b16ab853f42750730b01fbd198f3d549cdb9168575662f6e2e35193b8e4aaf8",
  "url": "https://osv.dev/vulnerability/CVE-2026-45764",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "Suricata http2: protocol-change type confusion can lead to denial of service",
    "summary": "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 protocol change while processing HTTP/2 traffic could lead to type confusion in Suricata. Crafted traffic may cause Suricata to crash, resulting in denial of service. Versions 7.0.16 and 8.0.5 contain a fix. As a workaround, disable HTTP/2 parsing if it is not required.",
    "evidence": "osv:CVE-2026-45764",
    "products": [],
    "severity": "critical",
    "structured": {
      "id": "CVE-2026-45764",
      "aliases": [
        "CVE-2026-45764",
        "GHSA-5rvq-72r5-rqhr"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/oisf/suricata",
              "type": "GIT",
              "events": [
                {
                  "introduced": "21ec99aa76cc5406007ce12a4891f2eaedb02291"
                },
                {
                  "fixed": "534864353e8d6e5d50991546f96e33f547879aec"
                },
                {
                  "introduced": "9956286fb89f9cad9e9f95b99dc751f8666617b7"
                },
                {
                  "fixed": "5611b60c6172fe4204cd69a9c9d466b6632dd0c7"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:oisf:suricata:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "7.0.0"
                      },
                      {
                        "fixed": "7.0.16"
                      }
                    ],
                    "source": "CPE_RANGE"
                  },
                  {
                    "cpe": "cpe:2.3:a:oisf:suricata:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "8.0.0"
                      },
                      {
                        "fixed": "8.0.5"
                      }
                    ],
                    "source": "CPE_RANGE"
                  }
                ]
              }
            }
          ],
          "versions": [
            "suricata-8.0.4",
            "suricata-7.0.15",
            "suricata-7.0.14",
            "suricata-8.0.3",
            "suricata-8.0.2",
            "suricata-7.0.13",
            "suricata-7.0.12",
            "suricata-8.0.1",
            "suricata-8.0.0",
            "suricata-7.0.11",
            "suricata-7.0.10",
            "suricata-7.0.9",
            "suricata-7.0.8",
            "suricata-7.0.7",
            "suricata-7.0.6",
            "suricata-7.0.5",
            "suricata-7.0.4",
            "suricata-7.0.3",
            "suricata-7.0.2",
            "suricata-7.0.1",
            "suricata-7.0.0"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-45764.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:37.598315612Z",
      "provider": "osv",
      "references": [
        "https://forum.suricata.io/t/suricata-8-0-5-and-7-0-16-released/6315",
        "https://redmine.openinfosecfoundation.org/issues/8492",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/45xxx/CVE-2026-45764.json",
        "https://github.com/OISF/suricata/security/advisories/GHSA-5rvq-72r5-rqhr",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-45764"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-843"
        ],
        "cna_assigner": "GitHub_M",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/45xxx/CVE-2026-45764.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-45764",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 504673,
  "published_at": "2026-09-10T21:14:30.072+00:00"
}