CVE-2026-54919

{
  "id": "CVE-2026-54919",
  "sourceIdentifier": "[email protected]",
  "published": "2026-07-10T17:16:58.700",
  "lastModified": "2026-10-25T15:10:00.147",
  "vulnStatus": "Analyzed",
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "cpp-httplib is a C++11 single-file header-only cross platform HTTP/HTTPS library. In affected Mbed TLS backend versions from 0.31.0 through 0.46.1 and wolfSSL backend versions from 0.33.0 through 0.46.1, when cpp-httplib is built with CPPHTTPLIB_MBEDTLS_SUPPORT or CPPHTTPLIB_WOLFSSL_SUPPORT and a client connects to an IP-literal host with server certificate verification enabled, SSLClient and Client in HTTPS mode skip certificate chain validation and WebSocketClient on the Mbed TLS backend skips verification altogether, allowing a man-in-the-middle attacker positioned to intercept traffic to present a crafted certificate and read or modify the traffic. This issue is fixed in version 0.47.0."
    },
    {
      "lang": "es",
      "value": "cpp-httplib es una biblioteca HTTP/HTTPS multiplataforma de un solo archivo de cabecera para C++11. En las versiones afectadas del backend Mbed TLS desde la 0.31.0 hasta la 0.46.1 y las versiones del backend wolfSSL desde la 0.33.0 hasta la 0.46.1, cuando cpp-httplib se compila con CPPHTTPLIB_MBEDTLS_SUPPORT o CPPHTTPLIB_WOLFSSL_SUPPORT y un cliente se conecta a un host IP-literal con la verificación del certificado del servidor habilitada, SSLClient y Client en modo HTTPS omiten la validación de la cadena de certificados y WebSocketClient en el backend Mbed TLS omite la verificación por completo, permitiendo que un atacante man-in-the-middle posicionado para interceptar el tráfico presente un certificado manipulado y lea o modifique el tráfico. Este problema se corrige en la versión 0.47.0."
    }
  ],
  "affected": [
    {
      "source": "[email protected]",
      "affectedData": [
        {
          "vendor": "yhirose",
          "product": "cpp-httplib",
          "versions": [
            {
              "version": ">= 0.31.0, < 0.47.0",
              "status": "affected"
            }
          ]
        }
      ]
    }
  ],
  "metrics": {
    "cvssMetricV31": [
      {
        "source": "[email protected]",
        "type": "Secondary",
        "cvssData": {
          "version": "3.1",
          "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N",
          "baseScore": 7.4,
          "baseSeverity": "HIGH",
          "attackVector": "NETWORK",
          "attackComplexity": "HIGH",
          "privilegesRequired": "NONE",
          "userInteraction": "NONE",
          "scope": "UNCHANGED",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "availabilityImpact": "NONE"
        },
        "exploitabilityScore": 2.2,
        "impactScore": 5.2
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "timestamp": "2026-07-13T00:00:00+00:00",
          "id": "CVE-2026-54919",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "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:yhirose:cpp-httplib:*:*:*:*:*:*:*:*",
              "versionStartIncluding": "0.31.0",
              "versionEndExcluding": "0.47.0",
              "matchCriteriaId": "E8E62B4D-9F4B-4054-86B3-E29CDFD59056"
            }
          ]
        }
      ]
    }
  ],
  "references": [
    {
      "url": "https://github.com/yhirose/cpp-httplib/commit/fa981cedae004ea9d946f1392b9dec22fac6fee6",
      "source": "[email protected]",
      "tags": [
        "Patch"
      ]
    },
    {
      "url": "https://github.com/yhirose/cpp-httplib/releases/tag/v0.47.0",
      "source": "[email protected]",
      "tags": [
        "Product",
        "Release Notes"
      ]
    },
    {
      "url": "https://github.com/yhirose/cpp-httplib/security/advisories/GHSA-8ffh-4p95-g3p2",
      "source": "[email protected]",
      "tags": [
        "Mitigation",
        "Patch",
        "Vendor Advisory"
      ]
    }
  ]
}