CVE-2026-43913

{
  "id": "CVE-2026-43913",
  "sourceIdentifier": "[email protected]",
  "published": "2026-05-11T23:20:22.120",
  "lastModified": "2026-10-26T18:10:00.173",
  "vulnStatus": "Analyzed",
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "Vaultwarden is a Bitwarden-compatible server written in Rust. Prior to 1.35.5, Vaultwarden allows an unconfirmed organization owner to purge the entire organization vault. The organization invite flow uses a two-step process: accepting an invite transitions membership from Invited to Accepted, and a separate confirmation by an existing owner upgrades it to Confirmed. The POST /api/ciphers/purge endpoint uses plain Headers and only checks that the membership type is Owner without verifying that the membership status is Confirmed. An authenticated user who has been invited as an organization owner and has accepted the invite and has not yet been confirmed can call this endpoint to hard-delete all ciphers and attachments in the organization,\ncausing immediate organization-wide data loss. This vulnerability is fixed in 1.35.5."
    },
    {
      "lang": "es",
      "value": "Vaultwarden es un servidor compatible con Bitwarden escrito en Rust. Antes de la versión 1.35.5, Vaultwarden permite a un propietario de organización no confirmado purgar toda la bóveda de la organización. El flujo de invitación de la organización utiliza un proceso de dos pasos: aceptar una invitación transiciona la membresía de Invitado a Aceptado, y una confirmación separada por un propietario existente la actualiza a Confirmado. El endpoint POST /api/ciphers/purge utiliza encabezados planos y solo verifica que el tipo de membresía sea Propietario sin verificar que el estado de la membresía sea Confirmado. Un usuario autenticado que ha sido invitado como propietario de una organización, ha aceptado la invitación y aún no ha sido confirmado, puede llamar a este endpoint para eliminar permanentemente todos los cifrados y archivos adjuntos de la organización, causando una pérdida de datos inmediata en toda la organización. Esta vulnerabilidad se corrigió en la versión 1.35.5."
    }
  ],
  "affected": [
    {
      "source": "[email protected]",
      "affectedData": [
        {
          "vendor": "dani-garcia",
          "product": "vaultwarden",
          "versions": [
            {
              "version": "< 1.35.5",
              "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:U/C:N/I:H/A:H",
          "baseScore": 8.1,
          "baseSeverity": "HIGH",
          "attackVector": "NETWORK",
          "attackComplexity": "LOW",
          "privilegesRequired": "LOW",
          "userInteraction": "NONE",
          "scope": "UNCHANGED",
          "confidentialityImpact": "NONE",
          "integrityImpact": "HIGH",
          "availabilityImpact": "HIGH"
        },
        "exploitabilityScore": 2.8,
        "impactScore": 5.2
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "timestamp": "2026-05-15T18:25:29.842249Z",
          "id": "CVE-2026-43913",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "version": "2.0.3"
        }
      }
    ]
  },
  "weaknesses": [
    {
      "source": "[email protected]",
      "type": "Secondary",
      "description": [
        {
          "lang": "en",
          "value": "CWE-863"
        }
      ]
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "operator": "OR",
          "negate": false,
          "cpeMatch": [
            {
              "vulnerable": true,
              "criteria": "cpe:2.3:a:dani-garcia:vaultwarden:*:*:*:*:*:*:*:*",
              "versionEndExcluding": "1.35.5",
              "matchCriteriaId": "84C9FEC4-49EA-4F83-9E8F-9DA52A9A987E"
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  ],
  "references": [
    {
      "url": "https://github.com/dani-garcia/vaultwarden/security/advisories/GHSA-937x-3j8m-7w7p",
      "source": "[email protected]",
      "tags": [
        "Exploit",
        "Mitigation",
        "Vendor Advisory"
      ]
    }
  ]
}