CVE-2026-69183

{"id": "CVE-2026-69183", "cveTags": [], "metrics": {"ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-69183", "role": "CISA Coordinator", "options": [{"exploitation": "poc"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "version": "2.0.3", "timestamp": "2026-08-20T17:13:41.268782Z"}}], "cvssMetricV31": [{"type": "Secondary", "source": "security-advisories@github.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}]}, "affected": [{"source": "security-advisories@github.com", "affectedData": [{"vendor": "monkeytypegame", "product": "monkeytype", "versions": [{"status": "affected", "version": "<= 26.26.0"}]}]}], "published": "2026-08-20T17:19:34.387", "references": [{"url": "https://github.com/monkeytypegame/monkeytype/security/advisories/GHSA-c878-p3jh-mmjf", "source": "security-advisories@github.com"}, {"url": "https://github.com/monkeytypegame/monkeytype/security/advisories/GHSA-c878-p3jh-mmjf", "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0"}], "vulnStatus": "Deferred", "weaknesses": [{"type": "Primary", "source": "security-advisories@github.com", "description": [{"lang": "en", "value": "CWE-290"}, {"lang": "en", "value": "CWE-307"}, {"lang": "en", "value": "CWE-644"}]}], "descriptions": [{"lang": "en", "value": "Monkeytype is a minimalistic and customizable typing test. In 26.26.0 and earlier, the backend rate-limit key generator in backend/src/middlewares/rate-limit.ts uses client-controlled cf-connecting-ip and x-forwarded-for headers before the trust-proxy-derived req.ip value. An unauthenticated attacker can rotate either header to create a new bucket for each request, bypassing rootRateLimiter, badAuthRateLimiter, getKey(), and the getKeyWithUid() fallback used by public endpoints. This permits repeated POST /users/forgotPasswordEmail and verificationEmail requests, mail bombing registered users, consuming Firebase or SMTP quota, evading brute-force protection, and enabling resource exhaustion. Exploitability of cf-connecting-ip depends on deployment topology, but x-forwarded-for and direct-to-origin paths remain affected when those values are not overwritten by a trusted proxy. No fixed version is available as of this review."}, {"lang": "es", "value": "Monkeytype es una prueba de escritura minimalista y personalizable. En la versi\u00f3n 26.26.0 y anteriores, el generador de claves de l\u00edmite de tasa del backend en backend/src/middlewares/rate-limit.ts utiliza los encabezados cf-connecting-ip y x-forwarded-for controlados por el cliente antes del valor req.ip derivado de trust-proxy. Un atacante no autenticado puede rotar cualquiera de los encabezados para crear un nuevo 'bucket' para cada solicitud, eludiendo rootRateLimiter, badAuthRateLimiter, getKey() y el mecanismo de reserva getKeyWithUid() utilizado por los puntos finales p\u00fablicos. Esto permite solicitudes repetidas de POST /users/forgotPasswordEmail y verificationEmail, el bombardeo de correo electr\u00f3nico a usuarios registrados, el consumo de cuota de Firebase o SMTP, la evasi\u00f3n de la protecci\u00f3n contra fuerza bruta y la habilitaci\u00f3n del agotamiento de recursos. La explotabilidad de cf-connecting-ip depende de la topolog\u00eda de despliegue, pero x-forwarded-for y las rutas directas al origen permanecen afectadas cuando esos valores no son sobrescritos por un proxy de confianza. Ninguna versi\u00f3n corregida est\u00e1 disponible a partir de esta revisi\u00f3n."}], "lastModified": "2026-10-18T20:10:00.110", "sourceIdentifier": "security-advisories@github.com"}