CVE-2026-52840

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{"affected": [{"affectedData": [{"product": "easyappointments", "vendor": "alextselegidis", "versions": [{"status": "affected", "version": "< 1.6.0"}]}], "source": "security-advisories@github.com"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "Easy!Appointments is a self hosted appointment scheduler. In versions prior to 1.6.0, `Caldav::connect_to_server` at `application/controllers/Caldav.php:60` hands the request's `caldav_url` to a Guzzle `REPORT` call without scheme or host validation. A logged-in backend user (admin, provider, or secretary) reaches loopback, RFC1918, and link-local hosts on the deployment's network. The Guzzle exception path returns the upstream status code plus ~120 bytes of response body in the JSON `message` field (`Caldav.php:74-78`), so the SSRF is semi-blind. Version 1.6.0 contains a patch."}, {"lang": "es", "value": "Easy!Appointments es un programador de citas autohospedado. En versiones anteriores a la 1.6.0, \u2019Caldav::connect_to_server\u2019 en \u2019application/controllers/Caldav.php:60\u2019 pasa la \u2019caldav_url\u2019 de la solicitud a una llamada \u2019REPORT\u2019 de Guzzle sin validaci\u00f3n de esquema o de host. Un usuario de backend autenticado (administrador, proveedor o secretario) alcanza hosts de loopback, RFC1918 y link-local en la red del despliegue. La ruta de excepci\u00f3n de Guzzle devuelve el c\u00f3digo de estado ascendente m\u00e1s ~120 bytes del cuerpo de la respuesta en el campo JSON \u2019message\u2019 (\u2019Caldav.php:74-78\u2019), por lo que la SSRF es semi-ciega. La versi\u00f3n 1.6.0 contiene un parche."}], "id": "CVE-2026-52840", "lastModified": "2026-10-24T21:10:00.130", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 2.7, "baseSeverity": "LOW", "confidentialityImpact": "LOW", "integrityImpact": "NONE", "privilegesRequired": "HIGH", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:N/A:N", "version": "3.1"}, "exploitabilityScore": 1.2, "impactScore": 1.4, "source": "security-advisories@github.com", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-52840", "options": [{"exploitation": "poc"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-07-15T13:53:03.540827Z", "version": "2.0.3"}}]}, "published": "2026-07-14T16:17:00.670", "references": [{"source": "security-advisories@github.com", "url": "https://github.com/alextselegidis/easyappointments/commit/6eb9336a91cfb276379506625e81f5bd9ed3a536"}, {"source": "security-advisories@github.com", "url": "https://github.com/alextselegidis/easyappointments/security/advisories/GHSA-pm5p-7w5h-jm5q"}, {"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "url": "https://github.com/alextselegidis/easyappointments/security/advisories/GHSA-pm5p-7w5h-jm5q"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Deferred", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-918"}], "source": "security-advisories@github.com", "type": "Secondary"}]}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[0,1.6.0)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "easyappointments", "source": "cna", "vendor": "alextselegidis"}, "product": "easyappointments", "vendor": "alextselegidis"}], "created": "2026-07-14T16:45:04.161982+00:00", "updated": "2026-07-31T10:15:06.118849+00:00", "vendors": ["alextselegidis", "alextselegidis$PRODUCT$easyappointments"]}