CVE-2026-73155

{
  "id": "CVE-2026-73155",
  "sourceIdentifier": "5a6e4751-2f3f-4070-9419-94fb35b644e8",
  "published": "2026-08-11T08:17:21.183",
  "lastModified": "2026-10-24T15:10:00.190",
  "vulnStatus": "Deferred",
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "Affected versions of cti-transmute allow authenticated users to add or remove emoji reactions on comments without first checking whether those users are authorized to view the target comment.\n\n\nThe vulnerable react() handler passed an attacker-controlled comment_id directly to comments_repo.toggle_reaction() after only validating that the ID existed syntactically and that the requested emoji was permitted. Because comment-level visibility was not enforced, a user who could identify the ID of a private or otherwise inaccessible comment could modify reaction state on that comment despite lacking permission to access it.\n\n\nThe fix retrieves the target comment, rejects missing or deleted comments, retrieves its associated conversion, and enforces access.can_see_comment(current_user, comment, conversion). Unauthorized requests now receive HTTP 403."
    },
    {
      "lang": "es",
      "value": "Las versiones afectadas de cti-transmute permiten a usuarios autenticados añadir o eliminar reacciones de emoji en comentarios sin verificar primero si esos usuarios están autorizados para ver el comentario objetivo.\n\nEl gestor vulnerable react() pasó un comment_id controlado por el atacante directamente a comments_repo.toggle_reaction() después de solo validar que el ID existía sintácticamente y que el emoji solicitado estaba permitido. Debido a que la visibilidad a nivel de comentario no se aplicaba, un usuario que pudiera identificar el ID de un comentario privado o de otro modo inaccesible podría modificar el estado de reacción en ese comentario a pesar de carecer de permiso para acceder a él.\n\nLa solución recupera el comentario objetivo, rechaza los comentarios faltantes o eliminados, recupera su conversión asociada y aplica access.can_see_comment(current_user, comment, conversion). Las solicitudes no autorizadas ahora reciben HTTP 403."
    }
  ],
  "affected": [
    {
      "source": "5a6e4751-2f3f-4070-9419-94fb35b644e8",
      "affectedData": [
        {
          "vendor": "MISP",
          "product": "cti-transmute",
          "defaultStatus": "unaffected",
          "repo": "https://github.com/MISP/cti-transmute",
          "versions": [
            {
              "version": "0",
              "lessThanOrEqual": "1.4.0",
              "versionType": "semver",
              "status": "affected"
            }
          ]
        }
      ]
    }
  ],
  "metrics": {
    "cvssMetricV40": [
      {
        "source": "5a6e4751-2f3f-4070-9419-94fb35b644e8",
        "type": "Secondary",
        "cvssData": {
          "version": "4.0",
          "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:L/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X",
          "baseScore": 5.3,
          "baseSeverity": "MEDIUM",
          "attackVector": "NETWORK",
          "attackComplexity": "LOW",
          "attackRequirements": "NONE",
          "privilegesRequired": "LOW",
          "userInteraction": "NONE",
          "vulnConfidentialityImpact": "NONE",
          "vulnIntegrityImpact": "LOW",
          "vulnAvailabilityImpact": "NONE",
          "subConfidentialityImpact": "NONE",
          "subIntegrityImpact": "LOW",
          "subAvailabilityImpact": "NONE",
          "exploitMaturity": "NOT_DEFINED",
          "confidentialityRequirement": "NOT_DEFINED",
          "integrityRequirement": "NOT_DEFINED",
          "availabilityRequirement": "NOT_DEFINED",
          "modifiedAttackVector": "NOT_DEFINED",
          "modifiedAttackComplexity": "NOT_DEFINED",
          "modifiedAttackRequirements": "NOT_DEFINED",
          "modifiedPrivilegesRequired": "NOT_DEFINED",
          "modifiedUserInteraction": "NOT_DEFINED",
          "modifiedVulnConfidentialityImpact": "NOT_DEFINED",
          "modifiedVulnIntegrityImpact": "NOT_DEFINED",
          "modifiedVulnAvailabilityImpact": "NOT_DEFINED",
          "modifiedSubConfidentialityImpact": "NOT_DEFINED",
          "modifiedSubIntegrityImpact": "NOT_DEFINED",
          "modifiedSubAvailabilityImpact": "NOT_DEFINED",
          "Safety": "NOT_DEFINED",
          "Automatable": "NOT_DEFINED",
          "Recovery": "NOT_DEFINED",
          "valueDensity": "NOT_DEFINED",
          "vulnerabilityResponseEffort": "NOT_DEFINED",
          "providerUrgency": "NOT_DEFINED"
        }
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "timestamp": "2026-08-11T13:13:52.666628Z",
          "id": "CVE-2026-73155",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "version": "2.0.3"
        }
      }
    ]
  },
  "weaknesses": [
    {
      "source": "5a6e4751-2f3f-4070-9419-94fb35b644e8",
      "type": "Secondary",
      "description": [
        {
          "lang": "en",
          "value": "CWE-862"
        }
      ]
    }
  ],
  "references": [
    {
      "url": "https://github.com/MISP/cti-transmute/commit/a18c07c3dd4a74b91ad8dd23d6e84fee4bcbd457",
      "source": "5a6e4751-2f3f-4070-9419-94fb35b644e8"
    }
  ]
}