CVE-2026-59730

{
  "id": "CVE-2026-59730",
  "sourceIdentifier": "[email protected]",
  "published": "2026-07-27T21:17:05.843",
  "lastModified": "2026-10-24T13:10:00.147",
  "vulnStatus": "Deferred",
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "Astro is a web framework for content-driven websites. In versions 8.1.0 through 11.0.1, when trailingSlash: 'always' is configured, the @astrojs/node standalone server's static file handler appends a trailing slash to request paths and issues a 301 redirect. Paths beginning with /\\ (slash-backslash) were not recognized as internal paths, so the handler would echo the raw path back in the Location header. Because browsers treat \\ as / per the WHATWG URL specification, the resulting redirect could resolve to an external host. Preconditions for exploitation: trailingSlash: 'always' must be set (non-default; the default is 'ignore'), the request path must not have a file extension in its final segment, and an attacker must deliver the crafted link to a user. This issue has been fixed in version 11.0.2."
    },
    {
      "lang": "es",
      "value": "Astro es un framework web para sitios web basados en contenido. En las versiones 8.1.0 a 11.0.1, cuando trailingSlash: ’always’ está configurado, el gestor de archivos estáticos del servidor independiente @astrojs/node añade una barra final a las rutas de solicitud y emite una redirección 301. Las rutas que comienzan con /\\ (barra-barra invertida) no eran reconocidas como rutas internas, por lo que el gestor devolvía la ruta original en el encabezado Location. Debido a que los navegadores tratan \\ como / según la especificación de URL de WHATWG, la redirección resultante podría resolverse en un host externo. Precondiciones para la explotación: trailingSlash: ’always’ debe estar configurado (no es el valor predeterminado; el valor predeterminado es ’ignore’), la ruta de solicitud no debe tener una extensión de archivo en su segmento final, y un atacante debe entregar el enlace manipulado a un usuario. Este problema ha sido solucionado en la versión 11.0.2."
    }
  ],
  "affected": [
    {
      "source": "[email protected]",
      "affectedData": [
        {
          "vendor": "withastro",
          "product": "astro",
          "versions": [
            {
              "version": ">= 8.1.0, < 11.0.2",
              "status": "affected"
            }
          ]
        }
      ]
    }
  ],
  "metrics": {
    "cvssMetricV40": [
      {
        "source": "[email protected]",
        "type": "Secondary",
        "cvssData": {
          "version": "4.0",
          "vectorString": "CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:A/VC:N/VI:N/VA:N/SC:N/SI:L/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X",
          "baseScore": 2.1,
          "baseSeverity": "LOW",
          "attackVector": "NETWORK",
          "attackComplexity": "HIGH",
          "attackRequirements": "NONE",
          "privilegesRequired": "NONE",
          "userInteraction": "ACTIVE",
          "vulnConfidentialityImpact": "NONE",
          "vulnIntegrityImpact": "NONE",
          "vulnAvailabilityImpact": "NONE",
          "subConfidentialityImpact": "NONE",
          "subIntegrityImpact": "LOW",
          "subAvailabilityImpact": "NONE",
          "exploitMaturity": "NOT_DEFINED",
          "confidentialityRequirement": "NOT_DEFINED",
          "integrityRequirement": "NOT_DEFINED",
          "availabilityRequirement": "NOT_DEFINED",
          "modifiedAttackVector": "NOT_DEFINED",
          "modifiedAttackComplexity": "NOT_DEFINED",
          "modifiedAttackRequirements": "NOT_DEFINED",
          "modifiedPrivilegesRequired": "NOT_DEFINED",
          "modifiedUserInteraction": "NOT_DEFINED",
          "modifiedVulnConfidentialityImpact": "NOT_DEFINED",
          "modifiedVulnIntegrityImpact": "NOT_DEFINED",
          "modifiedVulnAvailabilityImpact": "NOT_DEFINED",
          "modifiedSubConfidentialityImpact": "NOT_DEFINED",
          "modifiedSubIntegrityImpact": "NOT_DEFINED",
          "modifiedSubAvailabilityImpact": "NOT_DEFINED",
          "Safety": "NOT_DEFINED",
          "Automatable": "NOT_DEFINED",
          "Recovery": "NOT_DEFINED",
          "valueDensity": "NOT_DEFINED",
          "vulnerabilityResponseEffort": "NOT_DEFINED",
          "providerUrgency": "NOT_DEFINED"
        }
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "timestamp": "2026-07-28T13:48:33.961696Z",
          "id": "CVE-2026-59730",
          "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-601"
        }
      ]
    }
  ],
  "references": [
    {
      "url": "https://github.com/withastro/astro/commit/eb6f97e391ee587747e37609c255c7cd4b9cce3c",
      "source": "[email protected]"
    },
    {
      "url": "https://github.com/withastro/astro/pull/17252",
      "source": "[email protected]"
    },
    {
      "url": "https://github.com/withastro/astro/releases/tag/@astrojs/[email protected]",
      "source": "[email protected]"
    },
    {
      "url": "https://github.com/withastro/astro/security/advisories/GHSA-r557-wffq-wvrc",
      "source": "[email protected]"
    }
  ]
}