« Volver al listado

CVE-2026-28787

Estado: AnalizadaCrítica (9)—

OneUptime is a solution for monitoring and managing online services. In version 10.0.11 and prior, the WebAuthn authentication implementation does not store the challenge on the server side. Instead, the challenge is returned to the client and accepted back from the client request body during verification. This violates the WebAuthn specification (W3C Web Authentication Level 2, §13.4.3) and allows an attacker who has obtained a valid WebAuthn assertion (e.g., via XSS, MitM, or log exposure) to replay it indefinitely, completely bypassing the second-factor authentication. No known patches are available.

CVSS

Probabilidad de explotación (EPSS)

EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).

🎯 Técnicas ATT&CK

Cómo se explota esta vulnerabilidad y qué consigue el atacante, en el lenguaje de MITRE ATT&CK.

Vector AV:N sin PR/UI permite explotación remota. La obtención de assertion WebAuthn válida (XSS, MitM) + falta de validación server-side del challenge permite replay indefinido del 2FA, otorgando acceso con credenciales autenticadas (T1078) y exposición de credenciales (T1212).

Inferido por nuestro agente de análisis a partir de la descripción oficial, el vector CVSS y la CWE, y comprobado por un supervisor. Puede contener errores.

🛡️ Mitigaciones ATT&CK que cubren estas técnicas

Application Developer GuidancePrivileged Account ManagementApplication Isolation and SandboxingExploit ProtectionUpdate SoftwareActive Directory Configuration

Tecnologías afectadas (1)

Hackerbay — Oneuptime

CWE

Referencias

JSON original (NVD)

Mostrar
{
  "id": "CVE-2026-28787",
  "cveTags": [],
  "metrics": {
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-28787",
          "role": "CISA Coordinator",
          "options": [
            {
              "exploitation": "poc"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "total"
            }
          ],
          "version": "2.0.3",
          "timestamp": "2026-03-09T19:46:13.788942Z"
        }
      }
    ],
    "cvssMetricV31": [
      {
        "type": "Secondary",
        "source": "security-advisories@github.com",
        "cvssData": {
          "scope": "CHANGED",
          "version": "3.1",
          "baseScore": 8.2,
          "attackVector": "NETWORK",
          "baseSeverity": "HIGH",
          "vectorString": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:N",
          "integrityImpact": "HIGH",
          "userInteraction": "NONE",
          "attackComplexity": "HIGH",
          "availabilityImpact": "NONE",
          "privilegesRequired": "LOW",
          "confidentialityImpact": "HIGH"
        },
        "impactScore": 5.8,
        "exploitabilityScore": 1.8
      },
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "scope": "CHANGED",
          "version": "3.1",
          "baseScore": 9,
          "attackVector": "NETWORK",
          "baseSeverity": "CRITICAL",
          "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H",
          "integrityImpact": "HIGH",
          "userInteraction": "NONE",
          "attackComplexity": "HIGH",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "confidentialityImpact": "HIGH"
        },
        "impactScore": 6,
        "exploitabilityScore": 2.2
      }
    ]
  },
  "affected": [
    {
      "source": "security-advisories@github.com",
      "affectedData": [
        {
          "vendor": "OneUptime",
          "product": "oneuptime",
          "versions": [
            {
              "status": "affected",
              "version": "<= 10.0.11"
            }
          ]
        }
      ]
    }
  ],
  "published": "2026-03-06T05:16:39.980",
  "references": [
    {
      "url": "https://github.com/OneUptime/oneuptime/security/advisories/GHSA-gjjc-pcwp-c74m",
      "tags": [
        "Exploit",
        "Vendor Advisory"
      ],
      "source": "security-advisories@github.com"
    }
  ],
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "type": "Secondary",
      "source": "security-advisories@github.com",
      "description": [
        {
          "lang": "en",
          "value": "CWE-287"
        },
        {
          "lang": "en",
          "value": "CWE-294"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "OneUptime is a solution for monitoring and managing online services. In version 10.0.11 and prior, the WebAuthn authentication implementation does not store the challenge on the server side. Instead, the challenge is returned to the client and accepted back from the client request body during verification. This violates the WebAuthn specification (W3C Web Authentication Level 2, §13.4.3) and allows an attacker who has obtained a valid WebAuthn assertion (e.g., via XSS, MitM, or log exposure) to replay it indefinitely, completely bypassing the second-factor authentication. No known patches are available."
    },
    {
      "lang": "es",
      "value": "OneUptime es una solución para monitorear y gestionar servicios en línea. En la versión 10.0.11 y anteriores, la implementación de autenticación WebAuthn no almacena el desafío en el lado del servidor. En su lugar, el desafío se devuelve al cliente y se acepta de nuevo desde el cuerpo de la solicitud del cliente durante la verificación. Esto viola la especificación WebAuthn (W3C Web Authentication Level 2, §13.4.3) y permite a un atacante que ha obtenido una aserción WebAuthn válida (por ejemplo, a través de XSS, MitM o exposición de registros) reproducirla indefinidamente, eludiendo completamente la autenticación de segundo factor. No hay parches conocidos disponibles."
    }
  ],
  "lastModified": "2026-06-17T10:29:02.663",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:hackerbay:oneuptime:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "01B6B6BB-F995-4484-9B9B-D1B690822055",
              "versionEndIncluding": "10.0.11"
            }
          ],
          "operator": "OR"
        }
      ]
    }
  ],
  "sourceIdentifier": "security-advisories@github.com"
}