CVE-2026-55241

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{"affected": [{"affectedData": [{"product": "Checkmate", "vendor": "bluewave-labs", "versions": [{"status": "affected", "version": "< 3.9.1"}]}], "source": "security-advisories@github.com"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "Checkmate is an open-source, self-hosted tool designed to track and monitor server hardware, uptime, response times, and incidents in real-time with beautiful visualizations. Prior to 3.9.1, the public POST /api/v1/auth/register route in server/src/api/routes/authRoutes.ts passes multipart profileImage uploads through in-memory Multer parsing before registration validation, without file-size, file-count, or MIME-type limits in server/src/api/middleware/upload.ts. An unauthenticated attacker can submit concurrent oversized files that are buffered before invalid registration or invite-token checks reject the request, exhausting memory and crashing or destabilizing the backend. This issue is fixed in version 3.9.1."}, {"lang": "es", "value": "Checkmate es una herramienta de c\u00f3digo abierto y autoalojada dise\u00f1ada para rastrear y monitorear el hardware del servidor, el tiempo de actividad, los tiempos de respuesta y los incidentes en tiempo real con hermosas visualizaciones. Antes de la versi\u00f3n 3.9.1, la ruta p\u00fablica POST /api/v1/auth/register en server/src/api/routes/authRoutes.ts procesa las cargas multipart de profileImage a trav\u00e9s del an\u00e1lisis en memoria de Multer antes de la validaci\u00f3n del registro, sin l\u00edmites de tama\u00f1o de archivo, recuento de archivos o tipo MIME en server/src/api/middleware/upload.ts. Un atacante no autenticado puede enviar archivos sobredimensionados concurrentes que se almacenan en b\u00fafer antes de que las comprobaciones de registro no v\u00e1lido o de token de invitaci\u00f3n rechacen la solicitud, agotando la memoria y provocando la ca\u00edda o desestabilizaci\u00f3n del backend. Este problema se solucion\u00f3 en la versi\u00f3n 3.9.1."}], "id": "CVE-2026-55241", "lastModified": "2026-10-14T21:10:00.183", "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": "security-advisories@github.com", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-55241", "options": [{"exploitation": "poc"}, {"automatable": "yes"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-08-25T11:47:48.710908Z", "version": "2.0.3"}}]}, "published": "2026-08-21T18:16:48.790", "references": [{"source": "security-advisories@github.com", "url": "https://github.com/bluewave-labs/Checkmate/commit/091c36cbf338b673110b0806d76df26d52516468"}, {"source": "security-advisories@github.com", "url": "https://github.com/bluewave-labs/Checkmate/releases/tag/v3.9.1"}, {"source": "security-advisories@github.com", "url": "https://github.com/bluewave-labs/Checkmate/security/advisories/GHSA-9xvg-x28f-m78m"}, {"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "url": "https://github.com/bluewave-labs/Checkmate/security/advisories/GHSA-9xvg-x28f-m78m"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Deferred", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-400"}, {"lang": "en", "value": "CWE-770"}], "source": "security-advisories@github.com", "type": "Secondary"}]}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[0,3.9.1)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "Checkmate", "source": "cna", "vendor": "bluewave-labs"}, "product": "checkmate", "vendor": "bluewave-labs"}], "created": "2026-08-21T19:30:04.960348+00:00", "updated": "2026-08-21T19:45:03.262637+00:00", "vendors": ["bluewave-labs", "bluewave-labs$PRODUCT$checkmate"]}