CVE-2026-55518

{
  "id": "CVE-2026-55518",
  "sourceIdentifier": "[email protected]",
  "published": "2026-07-17T21:17:09.173",
  "lastModified": "2026-10-24T20:10:00.137",
  "vulnStatus": "Deferred",
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "Avo is a framework to create admin panels for Ruby on Rails apps. Prior to 3.32.1 and 4.0.0.beta.51, Avo's association attach workflow checks attach_<association>? in the UI and GET /resources/:resource/:id/:related/new path, but the actual write endpoint, POST /resources/:resource/:id/:related, does not run the same authorization check before mutating the association through Avo::AssociationsController#create. An authenticated low-privileged Avo user can bypass hidden or disabled attach controls and directly attach related records to a parent record by sending a crafted POST request, which can lead to privilege escalation and cross-tenant data exposure where associations represent authorization-bearing relationships. This issue is fixed in versions 3.32.1 and 4.0.0.beta.51."
    },
    {
      "lang": "es",
      "value": "Avo es un framework para crear paneles de administración para aplicaciones Ruby on Rails. Antes de 3.32.1 y 4.0.0.beta.51, el flujo de trabajo de adjuntar asociaciones de Avo verifica attach_[association]? en la UI y la ruta GET /resources/:resource/:id/:related/new, pero el endpoint de escritura real, POST /resources/:resource/:id/:related, no ejecuta la misma verificación de autorización antes de mutar la asociación a través de Avo::AssociationsController#create. Un usuario de Avo autenticado con bajos privilegios puede eludir los controles de adjuntar ocultos o deshabilitados y adjuntar directamente registros relacionados a un registro padre enviando una solicitud POST manipulada, lo que puede llevar a una escalada de privilegios y exposición de datos entre inquilinos donde las asociaciones representan relaciones que conllevan autorización. Este problema está solucionado en las versiones 3.32.1 y 4.0.0.beta.51."
    }
  ],
  "affected": [
    {
      "source": "[email protected]",
      "affectedData": [
        {
          "vendor": "avo-hq",
          "product": "avo",
          "versions": [
            {
              "version": ">= 4.0.0.beta.1, < 4.0.0.beta.51",
              "status": "affected"
            },
            {
              "version": "< 3.32.1",
              "status": "affected"
            }
          ]
        }
      ]
    }
  ],
  "metrics": {
    "cvssMetricV31": [
      {
        "source": "[email protected]",
        "type": "Secondary",
        "cvssData": {
          "version": "3.1",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N",
          "baseScore": 9.6,
          "baseSeverity": "CRITICAL",
          "attackVector": "NETWORK",
          "attackComplexity": "LOW",
          "privilegesRequired": "LOW",
          "userInteraction": "NONE",
          "scope": "CHANGED",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "availabilityImpact": "NONE"
        },
        "exploitabilityScore": 3.1,
        "impactScore": 5.8
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "timestamp": "2026-07-20T15:18:54.194227Z",
          "id": "CVE-2026-55518",
          "options": [
            {
              "exploitation": "poc"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "total"
            }
          ],
          "role": "CISA Coordinator",
          "version": "2.0.3"
        }
      }
    ]
  },
  "weaknesses": [
    {
      "source": "[email protected]",
      "type": "Secondary",
      "description": [
        {
          "lang": "en",
          "value": "CWE-639"
        },
        {
          "lang": "en",
          "value": "CWE-862"
        },
        {
          "lang": "en",
          "value": "CWE-863"
        }
      ]
    }
  ],
  "references": [
    {
      "url": "https://github.com/avo-hq/avo/commit/995928e586fd1788dd496bd51c4dbe4a79cb2b9c",
      "source": "[email protected]"
    },
    {
      "url": "https://github.com/avo-hq/avo/pull/4568",
      "source": "[email protected]"
    },
    {
      "url": "https://github.com/avo-hq/avo/releases/tag/v3.32.1",
      "source": "[email protected]"
    },
    {
      "url": "https://github.com/avo-hq/avo/security/advisories/GHSA-8fq9-273g-6mrg",
      "source": "[email protected]"
    },
    {
      "url": "https://github.com/avo-hq/avo/security/advisories/GHSA-8fq9-273g-6mrg",
      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0"
    }
  ]
}