{"id":"CVE-2026-124480","aliases":[],"url":"https://o3.security/vulnerability/CVE-2026-124480","summary":"OpenEMR before 8.4.0 contains an authorization bypass vulnerability that allows low-privileged authenticated users to read cross-patient FHIR QuestionnaireResponse data by sending the…","details":"OpenEMR before 8.4.0 contains an authorization bypass vulnerability that allows low-privileged authenticated users to read cross-patient FHIR QuestionnaireResponse data by sending the APICSRFTOKEN header. Attackers can reuse the session-exposed api_csrf_token_js value to skip FHIR scope checks and call GET /fhir/QuestionnaireResponse, exfiltrating site-wide questionnaire answer PHI.","published":"2026-11-08T13:16:00.035Z","modified":"2026-11-08T13:16:00.035Z","cvss":{"score":8.8,"severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"},"epss":null,"cisaKev":null,"exploitsKnown":null,"affectedPackages":[],"fix":null,"references":[{"type":"ADVISORY","url":"https://github.com/openemr/openemr/security/advisories/GHSA-5xf2-3h9x-f4m6"},{"type":"ADVISORY","url":"https://www.vulncheck.com/advisories/openemr-before-8.4.0-authorization-bypass-via-fhir-questionnaireresponse-apicsrftoken"}],"provenance":{"sources":["OSV.dev","NVD","FIRST.org (EPSS)"],"lastVerified":"2026-11-08T13:16:00.035Z"}}