CVE-2026-42560

{
  "id": "CVE-2026-42560",
  "cveTags": [],
  "metrics": {
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-42560",
          "role": "CISA Coordinator",
          "options": [
            {
              "exploitation": "poc"
            },
            {
              "automatable": "yes"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "version": "2.0.3",
          "timestamp": "2026-05-11T17:31:25.710343Z"
        }
      }
    ],
    "cvssMetricV31": [
      {
        "type": "Secondary",
        "source": "security-advisories@github.com",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 9.1,
          "attackVector": "NETWORK",
          "baseSeverity": "CRITICAL",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N",
          "integrityImpact": "HIGH",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "NONE",
          "privilegesRequired": "NONE",
          "confidentialityImpact": "HIGH"
        },
        "impactScore": 5.2,
        "exploitabilityScore": 3.9
      }
    ]
  },
  "affected": [
    {
      "source": "security-advisories@github.com",
      "affectedData": [
        {
          "vendor": "go-pkgz",
          "product": "auth",
          "versions": [
            {
              "status": "affected",
              "version": ">= 1.18.0, < 1.25.2"
            },
            {
              "status": "affected",
              "version": ">= 2.0.0, < 2.1.2"
            }
          ]
        }
      ]
    }
  ],
  "published": "2026-05-09T06:16:10.603",
  "references": [
    {
      "url": "https://github.com/go-pkgz/auth/commit/c0b15ee72a8401da83c01781c16636c521f42698",
      "source": "security-advisories@github.com"
    },
    {
      "url": "https://github.com/go-pkgz/auth/releases/tag/v1.25.2",
      "source": "security-advisories@github.com"
    },
    {
      "url": "https://github.com/go-pkgz/auth/releases/tag/v2.1.2",
      "source": "security-advisories@github.com"
    },
    {
      "url": "https://github.com/go-pkgz/auth/security/advisories/GHSA-f6qq-3m3h-4g42",
      "source": "security-advisories@github.com"
    },
    {
      "url": "https://github.com/go-pkgz/auth/security/advisories/GHSA-f6qq-3m3h-4g42",
      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0"
    }
  ],
  "vulnStatus": "Deferred",
  "weaknesses": [
    {
      "type": "Secondary",
      "source": "security-advisories@github.com",
      "description": [
        {
          "lang": "en",
          "value": "CWE-287"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "auth provides authentication via oauth2, direct and email. From versions 1.18.0 to before 1.25.2 and 2.0.0 to before 2.1.2, the Patreon OAuth provider maps every authenticated Patreon account to the same local user.ID, instead of deriving a unique ID from the Patreon account returned by Patreon. In practice, this means all Patreon-authenticated users of an application using this library are collapsed into a single local identity. Any application that trusts token.User.ID as the stable account key can end up mixing or fully merging unrelated Patreon users, which can lead to cross-account access, privilege confusion, and subscription-state leakage. This issue has been patched in versions 1.25.2 and 2.1.2."
    },
    {
      "lang": "es",
      "value": "auth proporciona autenticación a través de oauth2, directo y correo electrónico. Desde las versiones 1.18.0 hasta antes de la 1.25.2 y de la 2.0.0 hasta antes de la 2.1.2, el proveedor OAuth de Patreon mapea cada cuenta de Patreon autenticada al mismo user.ID local, en lugar de derivar un ID único de la cuenta de Patreon devuelta por Patreon. En la práctica, esto significa que todos los usuarios autenticados con Patreon de una aplicación que utiliza esta biblioteca se colapsan en una única identidad local. Cualquier aplicación que confíe en token.User.ID como la clave de cuenta estable puede terminar mezclando o fusionando completamente usuarios de Patreon no relacionados, lo que puede llevar a acceso entre cuentas, confusión de privilegios y fuga de estado de suscripción. Este problema ha sido parcheado en las versiones 1.25.2 y 2.1.2."
    }
  ],
  "lastModified": "2026-07-24T21:10:00.143",
  "sourceIdentifier": "security-advisories@github.com"
}