CVE-2026-27135

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Prior to version 1.68.1, the nghttp2 library stops reading the incoming data when user facing public API `nghttp2_session_terminate_session` or `nghttp2_session_terminate_session2` is called by the application. They might be called internally by the library when it detects the situation that is subject to connection error. Due to the missing internal state validation, the library keeps reading the rest of the data after one of those APIs is called. Then receiving a malformed frame that causes FRAME_SIZE_ERROR causes assertion failure. nghttp2 v1.68.1 adds missing state validation to avoid assertion failure. No known workarounds are available."}, {"lang": "es", "value": "nghttp2 es una implementaci\u00f3n del Protocolo de Transferencia de Hipertexto versi\u00f3n 2 en C. Antes de la versi\u00f3n 1.68.1, la biblioteca nghttp2 deja de leer los datos entrantes cuando la aplicaci\u00f3n llama a la API p\u00fablica orientada al usuario 'nghttp2_session_terminate_session' o 'nghttp2_session_terminate_session2'. Estas pueden ser llamadas internamente por la biblioteca cuando esta detecta una situaci\u00f3n sujeta a error de conexi\u00f3n. Debido a la falta de validaci\u00f3n del estado interno, la biblioteca sigue leyendo el resto de los datos despu\u00e9s de que se llama a una de esas APIs. Luego, recibir una trama malformada que causa FRAME_SIZE_ERROR provoca un fallo de aserci\u00f3n. nghttp2 v1.68.1 a\u00f1ade la validaci\u00f3n de estado faltante para evitar el fallo de aserci\u00f3n. No se conocen soluciones alternativas disponibles."}], "lastModified": "2026-07-15T02:19:03.367", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:nghttp2:nghttp2:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "1D6F266C-6337-477C-9A88-F7692CF26822", "versionEndExcluding": "1.68.1"}], "operator": "OR"}]}], "sourceIdentifier": "security-advisories@github.com"}