{"id":"CVE-2026-93955","summary":"grimmory-tools grimmory Download Endpoint KoboController.java streamFileToResponse authorization","details":"A vulnerability was detected in grimmory-tools grimmory up to 3.3.3/3.4.1. Affected by this vulnerability is the function streamFileToResponse of the file backend/src/main/java/org/booklore/controller/KoboController.java of the component Download Endpoint. Performing a manipulation of the argument bookId results in authorization bypass. The attack may be initiated remotely. The exploit is now public and may be used. Issue #2431 is closed as completed, but its only comment states that the issue “has already been reported elsewhere.” No fixing commit or pull request is identified there.","modified":"2026-09-23T03:30:51.454186897Z","published":"2026-09-19T22:15:09.092Z","database_specific":{"cna_assigner":"VulDB","cwe_ids":["CWE-285","CWE-639"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/93xxx/CVE-2026-93955.json"},"references":[{"type":"WEB","url":"https://github.com/grimmory-tools/grimmory/"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/93xxx/CVE-2026-93955.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-93955"},{"type":"ADVISORY","url":"https://vuldb.com/cve/CVE-2026-93955"},{"type":"ADVISORY","url":"https://vuldb.com/submit/943921"},{"type":"ADVISORY","url":"https://vuldb.com/vuln/407914"},{"type":"REPORT","url":"https://github.com/grimmory-tools/grimmory/issues/2431"},{"type":"REPORT","url":"https://github.com/grimmory-tools/grimmory/issues/2431#issuecomment-5384402858"},{"type":"REPORT","url":"https://vuldb.com/vuln/407914/cti"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/grimmory-tools/grimmory","events":[{"introduced":"1d707ffb0f3599b3dcbda44a62bd4b40c61c2fde"},{"last_affected":"ba47aaad27503e88afc98819318e0771a79f8822"}],"database_specific":{"extracted_events":[{"introduced":"3.3.0"},{"last_affected":"3.3.0"},{"introduced":"3.3.1"},{"last_affected":"3.3.1"},{"introduced":"3.3.2"},{"last_affected":"3.3.2"},{"introduced":"3.3.3"},{"last_affected":"3.3.3"},{"introduced":"3.4.0"},{"last_affected":"3.4.0"},{"introduced":"3.4.1"},{"last_affected":"3.4.1"}],"source":"AFFECTED_FIELD"}}],"versions":["3.3.0","3.3.1","3.3.2","3.3.3","3.4.0","3.4.1","v3.4.1","v3.4.0","v3.3.3","v3.3.2","v3.3.1","v3.3.0"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-93955.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:P"}]}