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CVE-2026-1002

Estado: AnalizadaMedia (6.9)—

The Vert.x Web static handler component cache can be manipulated to deny the access to static files served by the handler using specifically crafted request URI.

The issue comes from an improper implementation of the C. rule of section 5.2.4 of RFC3986 and is fixed in Vert.x Core component (used by Vert.x Web): https://github.com/eclipse-vertx/vert.x/pull/5895

Steps to reproduce Given a file served by the static handler, craft an URI that introduces a string like bar%2F..%2F after the last / char to deny the access to the URI with an HTTP 404 response. For example https://example.com/foo/index.html can be denied with https://example.com/foo/bar%2F..%2Findex.html

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Mitgation Disabling Static Handler cache fixes the issue.

Detalles técnicos trazas, registros y código del informe original
StaticHandler staticHandler = StaticHandler.create().setCachingEnabled(false);

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).

Tecnologías afectadas (1)

Eclipse — Vert.x-web

CWE

Referencias

JSON original (NVD)

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          "product": "Eclipse Vert.x",
          "versions": [
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              "versionType": "semver",
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          "packageName": "io.vertx",
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  "published": "2026-01-15T21:16:05.640",
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      "tags": [
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        "Patch"
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      "source": "emo@eclipse.org"
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      "source": "emo@eclipse.org",
      "description": [
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  "descriptions": [
    {
      "lang": "en",
      "value": "The Vert.x Web static handler component cache can be manipulated to deny the access to static files served by the handler using specifically crafted request URI.\n\n\nThe issue comes from an improper implementation of the C. rule of section 5.2.4 of RFC3986 and is fixed in Vert.x Core component (used by Vert.x Web):  https://github.com/eclipse-vertx/vert.x/pull/5895 \n\n\n\nSteps to reproduce\nGiven a file served by the static handler, craft an URI that introduces a string like bar%2F..%2F after the last / char to deny the access to the URI with an HTTP 404 response. For example https://example.com/foo/index.html can be denied with https://example.com/foo/bar%2F..%2Findex.html\n\nMitgation\nDisabling Static Handler cache fixes the issue.\n\n\n\nStaticHandler staticHandler = StaticHandler.create().setCachingEnabled(false);"
    },
    {
      "lang": "es",
      "value": "La caché del componente de gestión de archivos estáticos de Vert.x Web puede manipularse para denegar el acceso a los archivos estáticos servidos por el gestor mediante una URI de solicitud diseñada específicamente. El problema se debe a una implementación incorrecta de la regla C. de la sección 5.2.4 del RFC 3986 y se ha corregido en el componente Vert.x Core (utilizado por Vert.x Web): https://github.com/eclipse-vertx/vert.x/pull/5895 Pasos para reproducir el problema: dado un archivo servido por el controlador estático, cree una URI que introduzca una cadena como bar%2F..%2F después del último carácter / para denegar el acceso a la URI con una respuesta HTTP 404. Por ejemplo, https://example.com/foo/index.html puede denegarse con https://example.com/foo/bar%2F..%2Findex.html. Solución: Desactivar la caché del Static Handler soluciona el problema. StaticHandler staticHandler = StaticHandler.create().setCachingEnabled(false);"
    }
  ],
  "lastModified": "2026-06-17T10:14:49.913",
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    {
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          "negate": false,
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