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CVE-2026-15075

Full vulnerability record from the local CVENow database.

Description

In Eclipse Vert.x versions up to and including 4.5.29 (4.x branch) and 5.1.4 (5.x branch), DefaultRedirectHandler (vertx-core) propagates all request headers as-is across cross-origin HTTP 30x redirects. Only Content-Length is stripped; no origin comparison (scheme, host, port) is performed before copying headers to the redirect target. As a result, credential headers, including Authorization, Cookie, Proxy-Authorization, and arbitrary custom headers such as X-API-Token, are forwarded to the redirect destination without the caller's knowledge. An attacker who can cause a Vert.x HttpClient to issue a request that is redirected to an attacker-controlled host (for example, by supplying a URL to a webhook dispatcher, image proxy, or microservice URL fetcher) can capture bearer tokens, basic-auth credentials, session cookies, and API keys attached to the original request.

Severity
HIGH
CVSS score
8.2 (v4.0)
Vulnerability status
Analyzed
Source identifier
[email protected]
Published
2026-07-14 09:16:40.180000
Last modified
2026-10-24 22:10:00.210000
View original CVE JSON 
{
  "id": "CVE-2026-15075",
  "sourceIdentifier": "[email protected]",
  "published": "2026-07-14T09:16:40.180",
  "lastModified": "2026-10-24T22:10:00.210",
  "vulnStatus": "Analyzed",
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In Eclipse Vert.x versions up to and including 4.5.29 (4.x branch) and 5.1.4 (5.x branch), DefaultRedirectHandler (vertx-core) propagates all request headers as-is across cross-origin HTTP 30x redirects. Only Content-Length is stripped; no origin comparison (scheme, host, port) is performed before copying headers to the redirect target.\nAs a result, credential headers, including Authorization, Cookie, Proxy-Authorization, and arbitrary custom headers such as X-API-Token, are forwarded to the redirect destination without the caller's knowledge.\n\n\n\n\nAn attacker who can cause a Vert.x HttpClient to issue a request that is redirected to an attacker-controlled host (for example, by supplying a URL to a webhook dispatcher, image proxy, or microservice URL fetcher) can capture bearer tokens, basic-auth credentials, session cookies, and API keys attached to the original request."
    },
    {
      "lang": "es",
      "value": "En las versiones de Eclipse Vert.x hasta la 4.5.29 (rama 4.x) y la 5.1.4 (rama 5.x) inclusive, DefaultRedirectHandler (vertx-core) propaga todos los encabezados de solicitud tal cual a través de redirecciones HTTP 30x de origen cruzado. Solo se elimina Content-Length; no se realiza ninguna comparación de origen (esquema, host, puerto) antes de copiar los encabezados al destino de la redirección.\nComo resultado, los encabezados de credenciales, incluyendo Autorización, cookie, Proxy-Authorization, y encabezados personalizados arbitrarios como X-API-Token, se reenvían al destino de la redirección sin el conocimiento del llamador.\n\nUn atacante que puede hacer que un Vert.x HttpClient emita una solicitud que se redirige a un host controlado por el atacante (por ejemplo, al proporcionar una URL a un despachador de webhook, un proxy de imagen o un recuperador de URL de microservicio) puede capturar tokens de portador, credenciales de autenticación básica, cookies de sesión y claves API adjuntas a la solicitud original."
    }
  ],
  "affected": [
    {
      "source": "[email protected]",
      "affectedData": [
        {
          "vendor": "Eclipse Foundation",
          "product": "Eclipse Vert.x",
          "defaultStatus": "unaffected",
          "repo": "https://github.com/eclipse-vertx/vert.x",
          "versions": [
            {
              "version": "4.0.0",
              "lessThanOrEqual": "4.5.29",
              "versionType": "semver",
              "status": "affected"
            },
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              "version": "5.0.0",
              "lessThanOrEqual": "5.1.4",
              "versionType": "semver",
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            }
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        }
      ]
    }
  ],
  "metrics": {
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        "type": "Secondary",
        "cvssData": {
          "version": "4.0",
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          "baseScore": 8.2,
          "baseSeverity": "HIGH",
          "attackVector": "NETWORK",
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          "privilegesRequired": "NONE",
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          "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",
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          "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"
        }
      }
    ],
    "cvssMetricV31": [
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        "source": "[email protected]",
        "type": "Primary",
        "cvssData": {
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          "scope": "UNCHANGED",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "NONE",
          "availabilityImpact": "NONE"
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      }
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    "ssvcV203": [
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        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
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          "id": "CVE-2026-15075",
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            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "version": "2.0.3"
        }
      }
    ]
  },
  "weaknesses": [
    {
      "source": "[email protected]",
      "type": "Secondary",
      "description": [
        {
          "lang": "en",
          "value": "CWE-200"
        },
        {
          "lang": "en",
          "value": "CWE-346"
        }
      ]
    }
  ],
  "configurations": [
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  "references": [
    {
      "url": "https://gitlab.eclipse.org/security/cve-assignment/-/work_items/161",
      "source": "[email protected]",
      "tags": [
        "Issue Tracking"
      ]
    }
  ]
}