CVE-2026-68561

{
  "id": "CVE-2026-68561",
  "sourceIdentifier": "[email protected]",
  "published": "2026-08-19T20:17:21.400",
  "lastModified": "2026-10-26T10:10:00.140",
  "vulnStatus": "Deferred",
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "Wekan is open source kanban built with Meteor. Prior to 9.89, the second Boards.allow({ update }) rule in server/permissions/boards.js called canUpdateBoardSort in server/lib/utils.js, which authorized any board member whenever fieldNames included sort. Because Meteor combines allow rules with OR semantics and applies the complete modifier, a comment-only or read-only member could send one Boards.update with $set values for sort, members, permission, and title, make themselves the sole board administrator, expose a private board, and evict the legitimate owner; the last-admin deny rule inspected only $pull and did not block a wholesale $set of members. Version 9.89 requires sort to be the only modified field and rejects $set member arrays that remove the last active administrator. This issue is fixed in version 9.89."
    },
    {
      "lang": "es",
      "value": "Wekan es un kanban de código abierto construido con Meteor. Antes de la versión 9.89, la segunda regla Boards.allow({ update }) en server/permissions/boards.js llamaba a canUpdateBoardSort en server/lib/utils.js, lo que autorizaba a cualquier miembro del tablero siempre que fieldNames incluía sort. Debido a que Meteor combina las reglas de permiso con semántica OR y aplica el modificador completo, un miembro solo de comentarios o de solo lectura podía enviar una actualización de Boards con valores $set para sort, members, permission y title, convertirse en el único administrador del tablero, exponer un tablero privado y expulsar al propietario legítimo; la regla de denegación del último administrador inspeccionaba solo $pull y no bloqueaba un $set masivo de members. La versión 9.89 requiere que sort sea el único campo modificado y rechaza los arrays de miembros $set que eliminan al último administrador activo. Este problema está solucionado en la versión 9.89."
    }
  ],
  "affected": [
    {
      "source": "[email protected]",
      "affectedData": [
        {
          "vendor": "wekan",
          "product": "wekan",
          "versions": [
            {
              "version": "< 9.89",
              "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:H/I:H/A:H",
          "baseScore": 8.8,
          "baseSeverity": "HIGH",
          "attackVector": "NETWORK",
          "attackComplexity": "LOW",
          "privilegesRequired": "LOW",
          "userInteraction": "NONE",
          "scope": "UNCHANGED",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "availabilityImpact": "HIGH"
        },
        "exploitabilityScore": 2.8,
        "impactScore": 5.9
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "timestamp": "2026-08-25T13:57:05.363320Z",
          "id": "CVE-2026-68561",
          "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-269"
        },
        {
          "lang": "en",
          "value": "CWE-863"
        }
      ]
    }
  ],
  "references": [
    {
      "url": "https://github.com/wekan/wekan/commit/dc135f6e7d59f9f56065cd5df83b1f123ea120bb",
      "source": "[email protected]"
    },
    {
      "url": "https://github.com/wekan/wekan/releases/tag/v9.89",
      "source": "[email protected]"
    },
    {
      "url": "https://github.com/wekan/wekan/security/advisories/GHSA-xm8x-c8wg-jhmf",
      "source": "[email protected]"
    },
    {
      "url": "https://github.com/wekan/wekan/security/advisories/GHSA-xm8x-c8wg-jhmf",
      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0"
    }
  ]
}