FKIE_CVE-2026-1002

Vulnerability from fkie_nvd - Published: 2026-01-15 21:16 - Updated: 2026-02-05 16:50
Severity ?
5.3 (Medium) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Summary
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 Mitgation Disabling Static Handler cache fixes the issue. StaticHandler staticHandler = StaticHandler.create().setCachingEnabled(false);
References
emo@eclipse.orghttps://github.com/eclipse-vertx/vert.x/pull/5895Issue Tracking, Patch
134c704f-9b21-4f2e-91b3-4a467353bcc0https://github.com/vert-x3/vertx-web/issues/2836Exploit
Impacted products
Vendor Product Version
eclipse vert.x-web *
eclipse vert.x-web *
To clipboard 

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          "cpeMatch": [
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              "criteria": "cpe:2.3:a:eclipse:vert.x-web:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "B0EFC135-C1C4-4CB9-A987-BD60A9598D23",
              "versionEndIncluding": "4.5.23",
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  "cveTags": [],
  "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 cach\u00e9 del componente de gesti\u00f3n de archivos est\u00e1ticos de Vert.x Web puede manipularse para denegar el acceso a los archivos est\u00e1ticos servidos por el gestor mediante una URI de solicitud dise\u00f1ada espec\u00edficamente. El problema se debe a una implementaci\u00f3n incorrecta de la regla C. de la secci\u00f3n 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 est\u00e1tico, cree una URI que introduzca una cadena como bar%2F..%2F despu\u00e9s del \u00faltimo car\u00e1cter / 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. Soluci\u00f3n: Desactivar la cach\u00e9 del Static Handler soluciona el problema. StaticHandler staticHandler = StaticHandler.create().setCachingEnabled(false);"
    }
  ],
  "id": "CVE-2026-1002",
  "lastModified": "2026-02-05T16:50:31.073",
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          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
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          "baseScore": 5.3,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L",
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          "Recovery": "NOT_DEFINED",
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          "attackRequirements": "NONE",
          "attackVector": "NETWORK",
          "availabilityRequirement": "NOT_DEFINED",
          "baseScore": 6.9,
          "baseSeverity": "MEDIUM",
          "confidentialityRequirement": "NOT_DEFINED",
          "exploitMaturity": "NOT_DEFINED",
          "integrityRequirement": "NOT_DEFINED",
          "modifiedAttackComplexity": "NOT_DEFINED",
          "modifiedAttackRequirements": "NOT_DEFINED",
          "modifiedAttackVector": "NOT_DEFINED",
          "modifiedPrivilegesRequired": "NOT_DEFINED",
          "modifiedSubAvailabilityImpact": "NOT_DEFINED",
          "modifiedSubConfidentialityImpact": "NOT_DEFINED",
          "modifiedSubIntegrityImpact": "NOT_DEFINED",
          "modifiedUserInteraction": "NOT_DEFINED",
          "modifiedVulnAvailabilityImpact": "NOT_DEFINED",
          "modifiedVulnConfidentialityImpact": "NOT_DEFINED",
          "modifiedVulnIntegrityImpact": "NOT_DEFINED",
          "privilegesRequired": "NONE",
          "providerUrgency": "NOT_DEFINED",
          "subAvailabilityImpact": "LOW",
          "subConfidentialityImpact": "NONE",
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          "userInteraction": "NONE",
          "valueDensity": "NOT_DEFINED",
          "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:L/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",
          "version": "4.0",
          "vulnAvailabilityImpact": "LOW",
          "vulnConfidentialityImpact": "NONE",
          "vulnIntegrityImpact": "NONE",
          "vulnerabilityResponseEffort": "NOT_DEFINED"
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  "published": "2026-01-15T21:16:05.640",
  "references": [
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      "source": "emo@eclipse.org",
      "tags": [
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      "url": "https://github.com/eclipse-vertx/vert.x/pull/5895"
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  "sourceIdentifier": "emo@eclipse.org",
  "vulnStatus": "Analyzed",
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          "lang": "en",
          "value": "CWE-444"
        }
      ],
      "source": "emo@eclipse.org",
      "type": "Secondary"
    }
  ]
}


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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

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  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
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  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



Detection rules are retrieved from Rulezet.