CVE-2026-69207

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{"affected": [{"affectedData": [{"product": "hono", "vendor": "honojs", "versions": [{"status": "affected", "version": "< 4.12.34"}]}], "source": "security-advisories@github.com"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "Hono is a Web application framework that provides support for any JavaScript runtime. Prior to 4.12.34, the built-in CORS middleware, hono/cors, is vulnerable to a regular expression denial of service (ReDoS). During a preflight OPTIONS request, the middleware parses the attacker-controlled Access-Control-Request-Headers header using a whitespace-tolerant regular expression whose backtracking makes its running time quadratic in the input length. Because the header value is bounded only by the deployment's maximum HTTP header size, a single preflight carrying a long run of whitespace can consume seconds of CPU and block request processing. On runtimes that share one execution thread across requests, this stalls concurrent requests as well, and repeated requests can render the service unresponsive. This affects the default configuration, since the vulnerable path is reached whenever cors() is used with an unset or empty allowHeaders. Applications that set a non-empty allowHeaders are not affected. This issue is fixed in version 4.12.34."}, {"lang": "es", "value": "Hono es un framework de aplicaci\u00f3n web que proporciona soporte para cualquier entorno de ejecuci\u00f3n de JavaScript. Antes de la versi\u00f3n 4.12.34, el middleware CORS incorporado, hono/cors, es vulnerable a una denegaci\u00f3n de servicio por expresi\u00f3n regular (ReDoS). Durante una solicitud OPTIONS de pre-vuelo, el middleware analiza el encabezado Access-Control-Request-Headers controlado por el atacante utilizando una expresi\u00f3n regular tolerante a espacios en blanco cuyo retroceso hace que su tiempo de ejecuci\u00f3n sea cuadr\u00e1tico en la longitud de la entrada. Debido a que el valor del encabezado est\u00e1 limitado solo por el tama\u00f1o m\u00e1ximo del encabezado HTTP de la implementaci\u00f3n, un \u00fanico pre-vuelo que contenga una larga secuencia de espacios en blanco puede consumir segundos de CPU y bloquear el procesamiento de solicitudes. En entornos de ejecuci\u00f3n que comparten un hilo de ejecuci\u00f3n entre solicitudes, esto tambi\u00e9n detiene las solicitudes concurrentes, y las solicitudes repetidas pueden hacer que el servicio no responda. Esto afecta la configuraci\u00f3n predeterminada, ya que la ruta vulnerable se alcanza siempre que se utiliza cors() con un allowHeaders no establecido o vac\u00edo. Las aplicaciones que establecen un allowHeaders no vac\u00edo no se ven afectadas. Este problema est\u00e1 solucionado en la versi\u00f3n 4.12.34."}], "id": "CVE-2026-69207", "lastModified": "2026-10-24T16:10:00.153", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "LOW", "baseScore": 5.3, "baseSeverity": "MEDIUM", "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:L", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 1.4, "source": "security-advisories@github.com", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-69207", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-08-10T13:33:06.679047Z", "version": "2.0.3"}}]}, "published": "2026-08-07T21:17:29.847", "references": [{"source": "security-advisories@github.com", "url": "https://github.com/honojs/hono/commit/93fc250d8b4df58ea542cb945171de8013d5e6d5"}, {"source": "security-advisories@github.com", "url": "https://github.com/honojs/hono/releases/tag/v4.12.34"}, {"source": "security-advisories@github.com", "url": "https://github.com/honojs/hono/security/advisories/GHSA-8j4g-w8fx-2239"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Deferred", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-1333"}], "source": "security-advisories@github.com", "type": "Secondary"}]}

{}

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