CVE-2026-49258

{
  "id": "CVE-2026-49258",
  "sourceIdentifier": "[email protected]",
  "published": "2026-07-28T19:17:36.000",
  "lastModified": "2026-10-23T23:10:00.157",
  "vulnStatus": "Deferred",
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "Nebula Mesh is a self-hosted control plane for the Slack Nebula mesh VPN. In versions 0.3.5 and below, the web UI (/ui/*) does not apply the per-operator CA scoping employed by the JSON API. This was partially addressed by GHSA-598g-h2vc-h5vg, but the changes were not implemented in the web read/mutation surface. Any authenticated non-admin operator (for example, one created via self-registration or OIDC) can access resources belonging to other operators. The host create/edit/mobile-bundle/network-create paths and all CA-management routes were already correctly scoped. A malicious operator could block or delete any other operator's host, or read any operator's hosts and networks. This issue has been fixed in version 0.3.6."
    },
    {
      "lang": "es",
      "value": "Nebula Mesh es un plano de control autoalojado para la VPN de malla Slack Nebula. En las versiones 0.3.5 e inferiores, la interfaz de usuario web (/ui/*) no aplica el alcance de CA por operador empleado por la API JSON. Esto fue abordado parcialmente por GHSA-598g-h2vc-h5vg, pero los cambios no fueron implementados en la superficie de lectura/mutación web. Cualquier operador autenticado no administrador (por ejemplo, uno creado mediante autorregistro u OIDC) puede acceder a recursos pertenecientes a otros operadores. Las rutas de creación/edición de host/paquete móvil/creación de red y todas las rutas de gestión de CA ya estaban correctamente delimitadas. Un operador malicioso podría bloquear o eliminar el host de cualquier otro operador, o leer los hosts y redes de cualquier operador. Este problema ha sido solucionado en la versión 0.3.6."
    }
  ],
  "affected": [
    {
      "source": "[email protected]",
      "affectedData": [
        {
          "vendor": "juev",
          "product": "nebula-mesh",
          "versions": [
            {
              "version": "< 0.3.6",
              "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": "2026-07-28T19:21:26.834734Z",
          "id": "CVE-2026-49258",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "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"
        }
      ]
    }
  ],
  "references": [
    {
      "url": "https://github.com/forgekeep/nebula-mesh/pull/161",
      "source": "[email protected]"
    },
    {
      "url": "https://github.com/forgekeep/nebula-mesh/security/advisories/GHSA-c6v2-3ffm-vcmc",
      "source": "[email protected]"
    }
  ]
}