CVE-2026-27829

{
  "id": "CVE-2026-27829",
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          "id": "CVE-2026-27829",
          "role": "CISA Coordinator",
          "options": [
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              "exploitation": "poc"
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            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
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          "version": "2.0.3",
          "timestamp": "2026-02-26T16:21:28.348418Z"
        }
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        "type": "Secondary",
        "source": "security-advisories@github.com",
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          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 6.5,
          "attackVector": "NETWORK",
          "baseSeverity": "MEDIUM",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L",
          "integrityImpact": "LOW",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "LOW",
          "privilegesRequired": "NONE",
          "confidentialityImpact": "NONE"
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        "impactScore": 2.5,
        "exploitabilityScore": 3.9
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          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:L",
          "integrityImpact": "LOW",
          "userInteraction": "NONE",
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          "availabilityImpact": "LOW",
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          "confidentialityImpact": "NONE"
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  "affected": [
    {
      "source": "security-advisories@github.com",
      "affectedData": [
        {
          "vendor": "withastro",
          "product": "astro",
          "versions": [
            {
              "status": "affected",
              "version": ">= 9.0.0, < 9.5.4"
            }
          ]
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  "published": "2026-02-26T01:16:24.390",
  "references": [
    {
      "url": "https://github.com/withastro/astro/commit/e01e98b063e90d274c42130ec2a60cc0966622c9",
      "tags": [
        "Patch"
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    {
      "url": "https://github.com/withastro/astro/security/advisories/GHSA-cj9f-h6r6-4cx2",
      "tags": [
        "Exploit",
        "Vendor Advisory"
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  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "type": "Secondary",
      "source": "security-advisories@github.com",
      "description": [
        {
          "lang": "en",
          "value": "CWE-918"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "Astro is a web framework. In versions 9.0.0 through 9.5.3, a bug in Astro's image pipeline allows bypassing `image.domains` / `image.remotePatterns` restrictions, enabling the server to fetch content from unauthorized remote hosts. Astro provides an `inferSize` option that fetches remote images at render time to determine their dimensions. Remote image fetches are intended to be restricted to domains the site developer has manually authorized (using the `image.domains` or `image.remotePatterns` options). However, when `inferSize` is used, no domain validation is performed — the image is fetched from any host regardless of the configured restrictions. An attacker who can influence the image URL (e.g., via CMS content or user-supplied data) can cause the server to fetch from arbitrary hosts. This allows bypassing `image.domains` / `image.remotePatterns` restrictions to make server-side requests to unauthorized hosts. This includes the risk of server-side request forgery (SSRF) against internal network services and cloud metadata endpoints. Version 9.5.4 fixes the issue."
    },
    {
      "lang": "es",
      "value": "Astro es un framework web. En las versiones 9.0.0 a 9.5.3, un error en la pipeline de imágenes de Astro permite eludir las restricciones de `image.domains` / `image.remotePatterns`, lo que permite al servidor obtener contenido de hosts remotos no autorizados. Astro proporciona una opción `inferSize` que obtiene imágenes remotas en el momento de la renderización para determinar sus dimensiones. La obtención de imágenes remotas está destinada a restringirse a dominios que el desarrollador del sitio ha autorizado manualmente (utilizando las opciones `image.domains` o `image.remotePatterns`). Sin embargo, cuando se utiliza `inferSize`, no se realiza ninguna validación de dominio — la imagen se obtiene de cualquier host independientemente de las restricciones configuradas. Un atacante que puede influir en la URL de la imagen (por ejemplo, a través de contenido de CMS o datos proporcionados por el usuario) puede hacer que el servidor obtenga contenido de hosts arbitrarios. Esto permite eludir las restricciones de `image.domains` / `image.remotePatterns` para realizar peticiones del lado del servidor a hosts no autorizados. Esto incluye el riesgo de falsificación de petición del lado del servidor (SSRF) contra servicios de red internos y puntos finales de metadatos en la nube. La versión 9.5.4 corrige el problema."
    }
  ],
  "lastModified": "2026-06-17T10:27:45.213",
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