CVE-2026-3547

{"id": "CVE-2026-3547", "cveTags": [], "metrics": {"cvssMetricV31": [{"type": "Secondary", "source": "facts@wolfssl.com", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 7.5, "attackVector": "NETWORK", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "NONE", "confidentialityImpact": "NONE"}, "impactScore": 3.6, "exploitabilityScore": 3.9}]}, "published": "2026-03-19T21:17:12.653", "references": [{"url": "https://github.com/wolfSSL/wolfssl/pull/9859", "tags": ["Issue Tracking", "Patch"], "source": "facts@wolfssl.com"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Secondary", "source": "facts@wolfssl.com", "description": [{"lang": "en", "value": "CWE-125"}]}], "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."}], "lastModified": "2026-03-26T18:27:31.467", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:wolfssl:wolfssl:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "DA3FA1CB-CEDC-4D49-9ECD-99BBF1602312", "versionEndExcluding": "5.9.0"}], "operator": "OR"}]}], "sourceIdentifier": "facts@wolfssl.com"}