PSIRT UI DoS attack

{
  "id": "a23096446a108436710bc02fde632babe709fd36d629ad8ece154e5cfa598a6e",
  "url": "https://fortiguard.fortinet.com/psirt/FG-IR-26-162",
  "method": "llm",
  "payload": {
    "kind": "patch",
    "title": "PSIRT UI DoS attack",
    "summary": "An unauthenticated attacker may cause a slow HTTP denial of service on the FortiOS web interface using crafted HTTP requests. FortiOS 7.6.0 through 7.6.6 is affected and is fixed in 7.6.7 or later; FortiOS 7.4 and 7.2 require migration to a fixed release. FortiOS 8.0 is not affected. Recommended mitigations include restricting administrator logins to trusted hosts and disabling GUI access on Internet-facing interfaces.",
    "evidence": "An Allocation of Resources Without Limits or Throttling vulnerability [CWE-770] in FortiOS may allow an unauthenticated attacker to perform a slow HTTP DoS attack on the web interface via crafted HTTP requests.",
    "products": [
      {
        "name": {
          "value": "FortiOS",
          "evidence": "FortiOS 7.6"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "7.6.7 or above",
            "evidence": "Upgrade to 7.6.7 or above"
          }
        ],
        "affected_versions": [
          {
            "value": "7.6.0 through 7.6.6",
            "evidence": "7.6.0 through 7.6.6"
          },
          {
            "value": "7.4 all versions",
            "evidence": "7.4 all versions"
          },
          {
            "value": "7.2 all versions",
            "evidence": "7.2 all versions"
          }
        ]
      },
      {
        "name": {
          "value": "FortiOS",
          "evidence": "FortiOS 8.0"
        },
        "prerequisites": [],
        "fixed_versions": [],
        "affected_versions": []
      }
    ],
    "severity": "medium",
    "fixed_cves": [],
    "related_cves": [
      {
        "value": "CVE-2026-71408",
        "evidence": "CVE ID CVE-2026-71408"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "Severity Medium"
  },
  "source_id": "official-fortinet-psirt",
  "document_id": 23580,
  "published_at": "2026-08-12T07:00:00+00:00"
}