CVE-2026-71290

{
  "id": "CVE-2026-71290",
  "sourceIdentifier": "[email protected]",
  "published": "2026-08-11T21:17:51.157",
  "lastModified": "2026-10-24T15:10:00.190",
  "vulnStatus": "Analyzed",
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "Improper TLS hostname verification vulnerability in Apache HttpComponents Client 5.4 or newer. HostnameVerificationPolicy#BUILTIN setting has no effect when used with the async version of HttpClient. An attacker that can intercept and modify traffic between the client and the server can impersonate the server by presenting a valid certificate for a different domain. \n\n\nPlease note the classic version of HttpClient is not affected by this vulnerability. \n\nAffected users are recommended to upgrade to at least version 5.6.4, which fixes the issue."
    },
    {
      "lang": "es",
      "value": "Vulnerabilidad de verificación de nombre de host TLS incorrecta en Apache HttpComponents Client 5.4 o posterior. La configuración HostnameVerificationPolicy#BUILTIN no tiene efecto cuando se usa con la versión asíncrona de HttpClient. Un atacante que puede interceptar y modificar el tráfico entre el cliente y el servidor puede suplantar al servidor presentando un certificado válido para un dominio diferente.\n\nTenga en cuenta que la versión clásica de HttpClient no se ve afectada por esta vulnerabilidad.\n\nSe recomienda a los usuarios afectados actualizar a la versión 5.6.4 como mínimo, que corrige el problema."
    }
  ],
  "affected": [
    {
      "source": "[email protected]",
      "affectedData": [
        {
          "vendor": "Apache Software Foundation",
          "product": "Apache HttpComponents Client",
          "defaultStatus": "unaffected",
          "collectionURL": "https://repo.maven.apache.org/maven2/",
          "packageName": "org.apache.httpcomponents.client5:httpclient5",
          "versions": [
            {
              "version": "5.4-alpha",
              "lessThanOrEqual": "5.6.3",
              "versionType": "semver",
              "status": "affected"
            }
          ]
        }
      ]
    }
  ],
  "metrics": {
    "cvssMetricV31": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "type": "Secondary",
        "cvssData": {
          "version": "3.1",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N",
          "baseScore": 9.1,
          "baseSeverity": "CRITICAL",
          "attackVector": "NETWORK",
          "attackComplexity": "LOW",
          "privilegesRequired": "NONE",
          "userInteraction": "NONE",
          "scope": "UNCHANGED",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "availabilityImpact": "NONE"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 5.2
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "timestamp": "2026-09-23T00:00:00+00:00",
          "id": "CVE-2026-71290",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "yes"
            },
            {
              "technicalImpact": "total"
            }
          ],
          "role": "CISA Coordinator",
          "version": "2.0.3"
        }
      }
    ]
  },
  "weaknesses": [
    {
      "source": "[email protected]",
      "type": "Secondary",
      "description": [
        {
          "lang": "en",
          "value": "CWE-295"
        }
      ]
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "operator": "OR",
          "negate": false,
          "cpeMatch": [
            {
              "vulnerable": true,
              "criteria": "cpe:2.3:a:apache:httpclient:*:*:*:*:*:*:*:*",
              "versionStartIncluding": "5.4",
              "versionEndExcluding": "5.6.4",
              "matchCriteriaId": "E0A77896-6021-44F0-9EA9-C79EECD7A7E8"
            }
          ]
        }
      ]
    }
  ],
  "references": [
    {
      "url": "https://lists.apache.org/thread/bhf7g2zwpom2ohvwjjjlonc93br2s8vq",
      "source": "[email protected]",
      "tags": [
        "Mailing List",
        "Release Notes"
      ]
    },
    {
      "url": "http://www.openwall.com/lists/oss-security/2026/08/13/6",
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Mailing List",
        "Third Party Advisory"
      ]
    }
  ]
}