CVE-2026-28434

{"id": "CVE-2026-28434", "cveTags": [], "metrics": {"ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-28434", "role": "CISA Coordinator", "options": [{"exploitation": "none"}, {"automatable": "yes"}, {"technicalImpact": "partial"}], "version": "2.0.3", "timestamp": "2026-03-04T20:45:05.207964Z"}}], "cvssMetricV31": [{"type": "Secondary", "source": "security-advisories@github.com", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 5.3, "attackVector": "NETWORK", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "NONE", "privilegesRequired": "NONE", "confidentialityImpact": "LOW"}, "impactScore": 1.4, "exploitabilityScore": 3.9}]}, "affected": [{"source": "security-advisories@github.com", "affectedData": [{"vendor": "yhirose", "product": "cpp-httplib", "versions": [{"status": "affected", "version": "< 0.35.0"}]}]}], "published": "2026-03-04T20:16:19.823", "references": [{"url": "https://github.com/yhirose/cpp-httplib/commit/defd907c7469c5c8281247b73bbd07be24c31164", "tags": ["Patch"], "source": "security-advisories@github.com"}, {"url": "https://github.com/yhirose/cpp-httplib/security/advisories/GHSA-8mpw-r4gc-xm7q", "tags": ["Exploit", "Mitigation", "Vendor Advisory"], "source": "security-advisories@github.com"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Secondary", "source": "security-advisories@github.com", "description": [{"lang": "en", "value": "CWE-200"}]}, {"type": "Primary", "source": "nvd@nist.gov", "description": [{"lang": "en", "value": "NVD-CWE-noinfo"}]}], "descriptions": [{"lang": "en", "value": "cpp-httplib is a C++11 single-file header-only cross platform HTTP/HTTPS library. Prior to 0.35.0, when a request handler throws a C++ exception and the application has not registered a custom exception handler via set_exception_handler(), the library catches the exception and writes its message directly into the HTTP response as a header named EXCEPTION_WHAT. This header is sent to whoever made the request, with no authentication check and no special configuration required to trigger it. The behavior is on by default. A developer who does not know to opt in to set_exception_handler() will ship a server that leaks internal exception messages to any client. This vulnerability is fixed in 0.35.0."}, {"lang": "es", "value": "cpp-httplib es una librer\u00eda HTTP/HTTPS multiplataforma de un solo archivo de solo encabezado C++11. Antes de la versi\u00f3n 0.35.0, cuando un gestor de solicitudes lanza una excepci\u00f3n de C++ y la aplicaci\u00f3n no ha registrado un gestor de excepciones personalizado a trav\u00e9s de set_exception_handler(), la librer\u00eda captura la excepci\u00f3n y escribe su mensaje directamente en la respuesta HTTP como un encabezado llamado EXCEPTION_WHAT. Este encabezado se env\u00eda a quienquiera que haya realizado la solicitud, sin verificaci\u00f3n de autenticaci\u00f3n y sin necesidad de configuraci\u00f3n especial para activarlo. El comportamiento est\u00e1 activado por defecto. Un desarrollador que no sabe c\u00f3mo optar por set_exception_handler() distribuir\u00e1 un servidor que filtra mensajes de excepci\u00f3n internos a cualquier cliente. Esta vulnerabilidad se corrige en la versi\u00f3n 0.35.0."}], "lastModified": "2026-06-17T10:28:38.347", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:yhirose:cpp-httplib:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "27E6A328-789B-48B3-B888-23C091A0766D", "versionEndExcluding": "0.35.0"}], "operator": "OR"}]}], "sourceIdentifier": "security-advisories@github.com"}