CVE-2026-54425

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{"affected": [{"affectedData": [{"collectionURL": "https://github.com", "defaultStatus": "unaffected", "packageName": "apache/brpc", "packageURL": "pkg:github/apache/brpc", "product": "Apache bRPC", "vendor": "Apache Software Foundation", "versions": [{"lessThan": "1.18.0", "status": "affected", "version": "0", "versionType": "semver"}]}], "source": "security@apache.org"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "Uncontrolled recursion in the HTTP/2 HPACK decoder in Apache bRPC before 1.18.0 allows remote attackers to cause denial of service by sending a crafted HTTP/2 header block containing many consecutive Dynamic Table Size Update entries. Each update was decoded by recursively invoking the HPACK decoder, which could exhaust the thread stack before a header field or end of input was reached.\n\nRoot Cause:\nThe bRPC HPACK decoder recursively decoded the next entry after processing a Dynamic Table Size Update. The decoder did not bound the recursion depth, so a long sequence of update entries could consume excessive stack space.\n\nAffected Scenarios:\nUse bRPC with the built-in HTTP/2 implementation to accept HTTP/2 traffic from an untrusted network.\n\nHow to Fix:\n1. Upgrade bRPC to version 1.18.0, which fixes this issue.\n2. Apply this patch: https://github.com/apache/brpc/pull/3343 \n\nNote:\nThe fix changes HPACK Dynamic Table Size Update decoding to use iterative parsing instead of recursive parsing."}, {"lang": "es", "value": "Recursi\u00f3n no controlada en el decodificador HPACK de HTTP/2 de Apache bRPC antes de la versi\u00f3n 1.18.0 permite a atacantes remotos provocar una denegaci\u00f3n de servicio enviando un bloque de encabezados HTTP/2 manipulado que contiene muchas entradas consecutivas de Actualizaci\u00f3n del tama\u00f1o de la tabla din\u00e1mica. Cada actualizaci\u00f3n se decodificaba invocando recursivamente el decodificador HPACK, lo que pod\u00eda agotar la pila del hilo antes de que se alcanzara un campo de encabezado o el final de la entrada.\\n\\nCausa ra\u00edz:\\nEl decodificador HPACK de bRPC decodificaba recursivamente la siguiente entrada despu\u00e9s de procesar una Actualizaci\u00f3n del tama\u00f1o de la tabla din\u00e1mica. El decodificador no limitaba la profundidad de la recursi\u00f3n, de modo que una larga secuencia de entradas de actualizaci\u00f3n pod\u00eda consumir un espacio de pila excesivo.\\n\\nEscenarios afectados:\\nUso de bRPC con la implementaci\u00f3n integrada de HTTP/2 para aceptar tr\u00e1fico HTTP/2 desde una red no confiable.\\n\\nC\u00f3mo solucionar:\\n1. Actualice bRPC a la versi\u00f3n 1.18.0, que corrige este problema. \\n2. Aplique este parche: https://github.com/apache/brpc/pull/3343\\n\\nNota:\\nLa correcci\u00f3n modifica la decodificaci\u00f3n de Actualizaciones del tama\u00f1o de la tabla din\u00e1mica de HPACK para usar un an\u00e1lisis iterativo en lugar de recursivo."}], "id": "CVE-2026-54425", "lastModified": "2026-10-30T14:17:05.960", "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": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-54425", "options": [{"exploitation": "none"}, {"automatable": "yes"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-10-30T13:45:42.813783Z", "version": "2.0.3"}}]}, "published": "2026-10-21T12:17:21.053", "references": [{"source": "security@apache.org", "url": "https://lists.apache.org/thread/2pf15ojj0vr7rtx95677kgtl1mx3gdgb"}], "sourceIdentifier": "security@apache.org", "vulnStatus": "Deferred", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-674"}], "source": "security@apache.org", "type": "Secondary"}]}

{}

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