CVE-2026-42551

{
  "id": "CVE-2026-42551",
  "sourceIdentifier": "[email protected]",
  "published": "2026-05-13T20:16:22.190",
  "lastModified": "2026-10-26T14:10:00.130",
  "vulnStatus": "Deferred",
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "Flight is an extensible micro-framework for PHP. Prior to 3.18.1, Request::getMethod() unconditionally honors the X-HTTP-Method-Override header and the $_REQUEST['_method'] parameter on any HTTP verb (including safe verbs such as GET), with no opt-in and no whitelist of permitted target methods. A GET request can silently become a DELETE or PUT, enabling CSRF escalation against destructive endpoints, bypass of middleware gated on unsafe verbs, and cache poisoning between CDN and origin. This vulnerability is fixed in 3.18.1."
    },
    {
      "lang": "es",
      "value": "Flight es un micro-framework extensible para PHP. Antes de la versión 3.18.1, Request::getMethod() honra incondicionalmente el encabezado X-HTTP-Method-Override y el parámetro $_REQUEST[’_method’] en cualquier verbo HTTP (incluyendo verbos seguros como GET), sin opción de activación y sin lista blanca de métodos objetivo permitidos. Una solicitud GET puede convertirse silenciosamente en un DELETE o PUT, lo que permite la escalada de CSRF contra puntos finales destructivos, eludir middleware restringido a verbos inseguros y el envenenamiento de caché entre CDN y origen. Esta vulnerabilidad está corregida en la versión 3.18.1."
    }
  ],
  "affected": [
    {
      "source": "[email protected]",
      "affectedData": [
        {
          "vendor": "flightphp",
          "product": "core",
          "versions": [
            {
              "version": "< 3.18.1",
              "status": "affected"
            }
          ]
        }
      ]
    }
  ],
  "metrics": {
    "cvssMetricV31": [
      {
        "source": "[email protected]",
        "type": "Secondary",
        "cvssData": {
          "version": "3.1",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N",
          "baseScore": 7.5,
          "baseSeverity": "HIGH",
          "attackVector": "NETWORK",
          "attackComplexity": "LOW",
          "privilegesRequired": "NONE",
          "userInteraction": "NONE",
          "scope": "UNCHANGED",
          "confidentialityImpact": "NONE",
          "integrityImpact": "HIGH",
          "availabilityImpact": "NONE"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 3.6
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "timestamp": "2026-05-14T12:49:44.246541Z",
          "id": "CVE-2026-42551",
          "options": [
            {
              "exploitation": "poc"
            },
            {
              "automatable": "yes"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "version": "2.0.3"
        }
      }
    ]
  },
  "weaknesses": [
    {
      "source": "[email protected]",
      "type": "Secondary",
      "description": [
        {
          "lang": "en",
          "value": "CWE-436"
        }
      ]
    }
  ],
  "references": [
    {
      "url": "https://github.com/flightphp/core/security/advisories/GHSA-vxrr-w42w-w76g",
      "source": "[email protected]"
    },
    {
      "url": "https://github.com/flightphp/core/security/advisories/GHSA-vxrr-w42w-w76g",
      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0"
    }
  ]
}