PSIRT Second-Order OS Command Injection via JSON Input on start vnc feature

{
  "id": "abb5015435040c41bb473e91aeebc8b21403a64837ce600f2b39631fcc2b2354",
  "url": "https://fortiguard.fortinet.com/psirt/FG-IR-26-141",
  "method": "llm",
  "payload": {
    "kind": "patch",
    "title": "PSIRT Second-Order OS Command Injection via JSON Input on start vnc feature",
    "summary": "An unauthenticated attacker may execute unauthorized commands through crafted HTTP requests. The announcement lists fixed upgrades for affected FortiSandbox, FortiSandbox Cloud, and FortiSandbox PaaS versions.",
    "evidence": "may allow an unauthenticated attacker to execute unauthorized commands via specifically crafted HTTP requests.",
    "products": [
      {
        "name": {
          "value": "FortiSandbox",
          "evidence": "FortiSandbox 5.0"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "5.0.6 or above",
            "evidence": "Upgrade to 5.0.6 or above"
          },
          {
            "value": "4.4.9 or above",
            "evidence": "Upgrade to 4.4.9 or above"
          }
        ],
        "affected_versions": [
          {
            "value": "5.0.0 through 5.0.5",
            "evidence": "5.0.0 through 5.0.5"
          },
          {
            "value": "4.4.0 through 4.4.8",
            "evidence": "4.4.0 through 4.4.8"
          }
        ]
      },
      {
        "name": {
          "value": "FortiSandbox Cloud",
          "evidence": "FortiSandbox Cloud 5.0"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "5.0.6 or above",
            "evidence": "Upgrade to 5.0.6 or above"
          }
        ],
        "affected_versions": [
          {
            "value": "5.0.4 through 5.0.5",
            "evidence": "5.0.4 through 5.0.5"
          }
        ]
      },
      {
        "name": {
          "value": "FortiSandbox PaaS",
          "evidence": "FortiSandbox PaaS 5.0"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "5.0.6 or above",
            "evidence": "Upgrade to 5.0.6 or above"
          }
        ],
        "affected_versions": [
          {
            "value": "5.0.4 through 5.0.5",
            "evidence": "5.0.4 through 5.0.5"
          }
        ]
      }
    ],
    "severity": "critical",
    "fixed_cves": [],
    "related_cves": [
      {
        "value": "CVE-2026-25089",
        "evidence": "CVE ID CVE-2026-25089"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "Severity Critical"
  },
  "source_id": "official-fortinet-psirt",
  "document_id": 23597,
  "published_at": "2026-06-09T07:00:00+00:00"
}