FKIE_CVE-2026-3547

Vulnerability from fkie_nvd - Published: 2026-03-19 21:17 - Updated: 2026-03-26 18:27
Severity
7.5 (High) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Summary
Out-of-bounds read in ALPN parsing due to incomplete validation. wolfSSL 5.8.4 and earlier contained an out-of-bounds read in ALPN handling when built with ALPN enabled (HAVE_ALPN / --enable-alpn). A crafted ALPN protocol list could trigger an out-of-bounds read, leading to a potential process crash (denial of service). Note that ALPN is disabled by default, but is enabled for these 3rd party compatibility features: enable-apachehttpd, enable-bind, enable-curl, enable-haproxy, enable-hitch, enable-lighty, enable-jni, enable-nginx, enable-quic.
References
facts@wolfssl.comhttps://github.com/wolfSSL/wolfssl/pull/9859Issue Tracking, Patch
Impacted products
Vendor Product Version
wolfssl wolfssl *
To clipboard 

{
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:wolfssl:wolfssl:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "DA3FA1CB-CEDC-4D49-9ECD-99BBF1602312",
              "versionEndExcluding": "5.9.0",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "Out-of-bounds read in ALPN parsing due to incomplete validation. wolfSSL 5.8.4 and earlier contained an out-of-bounds read in ALPN handling when built with ALPN enabled (HAVE_ALPN / --enable-alpn). A crafted ALPN protocol list could trigger an out-of-bounds read, leading to a potential process crash (denial of service). Note that ALPN is disabled by default, but is enabled for these 3rd party compatibility features: enable-apachehttpd, enable-bind, enable-curl, enable-haproxy, enable-hitch, enable-lighty, enable-jni, enable-nginx, enable-quic."
    },
    {
      "lang": "es",
      "value": "Lectura fuera de l\u00edmites en el an\u00e1lisis de ALPN debido a una validaci\u00f3n incompleta. wolfSSL 5.8.4 y versiones anteriores conten\u00edan una lectura fuera de l\u00edmites en el manejo de ALPN cuando se compilaba con ALPN habilitado (HAVE_ALPN / --enable-alpn). Una lista de protocolos ALPN manipulada podr\u00eda desencadenar una lectura fuera de l\u00edmites, lo que podr\u00eda llevar a un bloqueo potencial del proceso (denegaci\u00f3n de servicio). Tenga en cuenta que ALPN est\u00e1 deshabilitado por defecto, pero est\u00e1 habilitado para estas caracter\u00edsticas de compatibilidad de terceros: enable-apachehttpd, enable-bind, enable-curl, enable-haproxy, enable-hitch, enable-lighty, enable-jni, enable-nginx, enable-quic."
    }
  ],
  "id": "CVE-2026-3547",
  "lastModified": "2026-03-26T18:27:31.467",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "HIGH",
          "baseScore": 7.5,
          "baseSeverity": "HIGH",
          "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:H",
          "version": "3.1"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 3.6,
        "source": "facts@wolfssl.com",
        "type": "Secondary"
      }
    ]
  },
  "published": "2026-03-19T21:17:12.653",
  "references": [
    {
      "source": "facts@wolfssl.com",
      "tags": [
        "Issue Tracking",
        "Patch"
      ],
      "url": "https://github.com/wolfSSL/wolfssl/pull/9859"
    }
  ],
  "sourceIdentifier": "facts@wolfssl.com",
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-125"
        }
      ],
      "source": "facts@wolfssl.com",
      "type": "Secondary"
    }
  ]
}


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