CVE-2026-48083

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{"affected": [{"affectedData": [{"product": "appointment-booking-software", "vendor": "open-reception", "versions": [{"status": "affected", "version": "< 1.0.2"}]}], "source": "security-advisories@github.com"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "OpenReception's appointment booking software provides an end-to-end encrypted appointment booking platform. Prior to version 1.0.2, the `/api/log` endpoint accepts unauthenticated POST requests, applies no schema validation to the message body, writes attacker-controlled content directly into the application's stdout log, interprets newline characters as real line breaks, and enforces no size or rate limits. Three independent abuse modes follow: log injection (forge log lines that look like legitimate system events), log volume DoS (saturate the logging pipeline at sustained 100+ requests per second of small messages), and oversized-payload submission (100 KB payloads accepted; larger sizes not tested). The most operationally damaging mode is log injection. An attacker can inject lines that an operator scanning logs would mistake for real system errors, mask their own activity behind fake noise, or pollute SIEM alerting rules with crafted false positives. A line such as `[error]: injected admin error` injected from an unauthenticated source is indistinguishable from the application's own error output once written to disk. Version 1.0.2 fixes the issue."}, {"lang": "es", "value": "El software de reserva de citas de OpenReception proporciona una plataforma de reserva de citas cifrada de extremo a extremo. Antes de la versi\u00f3n 1.0.2, el endpoint \u201c/API/log\u201d acepta solicitudes POST no autenticadas, no aplica validaci\u00f3n de esquema al cuerpo del mensaje, escribe contenido controlado por el atacante directamente en el log stdout de la aplicaci\u00f3n, interpreta los caracteres de nueva l\u00ednea como saltos de l\u00ednea reales y no impone l\u00edmites de tama\u00f1o o de tasa. Se presentan tres modos de abuso independientes: inyecci\u00f3n de logs (falsificar l\u00edneas de log que parecen eventos leg\u00edtimos del sistema), DoS por volumen de logs (saturar la tuber\u00eda de logging con m\u00e1s de 100 solicitudes por segundo de mensajes peque\u00f1os de forma sostenida) y env\u00edo de payloads sobredimensionados (se aceptan payloads de 100 KB; tama\u00f1os mayores no probados). El modo m\u00e1s perjudicial operativamente es la inyecci\u00f3n de logs. Un atacante puede inyectar l\u00edneas que un operador que escanea los logs confundir\u00eda con errores reales del sistema, enmascarar su propia actividad detr\u00e1s de ruido falso o contaminar las reglas de alerta de SIEM con falsos positivos elaborados. Una l\u00ednea como \u2019[error]: injected admin error\u2019 inyectada desde una fuente no autenticada es indistinguible de la propia salida de error de la aplicaci\u00f3n una vez escrita en el disco. La versi\u00f3n 1.0.2 soluciona el problema."}], "id": "CVE-2026-48083", "lastModified": "2026-10-23T21:10:00.157", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "LOW", "baseScore": 6.5, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "LOW", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 2.5, "source": "security-advisories@github.com", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-48083", "options": [{"exploitation": "poc"}, {"automatable": "yes"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-08-08T02:41:23.087767Z", "version": "2.0.3"}}]}, "published": "2026-08-06T22:17:11.143", "references": [{"source": "security-advisories@github.com", "url": "https://github.com/open-reception/appointment-booking-software/commit/36104d21ee0b6616f1c10273ec9970a27cb56b57"}, {"source": "security-advisories@github.com", "url": "https://github.com/open-reception/appointment-booking-software/security/advisories/GHSA-fw48-38r5-7ffj"}, {"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "url": "https://github.com/open-reception/appointment-booking-software/security/advisories/GHSA-fw48-38r5-7ffj"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Deferred", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-117"}], "source": "security-advisories@github.com", "type": "Secondary"}]}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[0,1.0.2)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "cna", "scores": [{"score": 100.0, "source": "cna"}]}, "original": {"product": "appointment-booking-software", "source": "cna", "vendor": "open-reception"}, "product": "appointment-booking-software", "vendor": "open-reception"}], "created": "2026-08-07T00:30:06.734747+00:00", "updated": "2026-08-07T09:58:53.696104+00:00", "vendors": ["open-reception", "open-reception$PRODUCT$appointment-booking-software"]}