{"id":"CVE-2026-51876","title":"DeepTutor 1.4.0 contains an authorization bypass vulnerability in the book confirmation flow","summary":"DeepTutor 1.4.0 contains an authorization bypass vulnerability in the book confirmation flow. An unauthenticated or unauthorized caller can reuse a publicly exposed book_id to submit a confirm-proposal request for an existing book, causi…","severity":"critical","cvss":9.1,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N","cwe":["CWE-285"],"published":"2026-10-01","updated":"2026-10-06","sourceUpdated":"2026-10-06T01:16:35.727","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-51876","references":[{"url":"https://gist.github.com/Ro1ME/c5685936179edcbf942f3fdd745d1473","label":"cve@mitre.org"},{"url":"https://github.com/HKUDS/DeepTutor/issues/514","label":"cve@mitre.org"},{"url":"https://github.com/HKUDS/DeepTutor/issues/514","label":"134c704f-9b21-4f2e-91b3-4a467353bcc0"}],"tags":["nvd","cve.org","exploit-available"],"exploitAvailable":true,"ssvc":{"exploitation":"poc","automatable":"yes","technicalImpact":"total","timestamp":"2026-10-05T23:51:10.775228Z"},"epss":0.00324,"epssPercentile":0.2525,"ingestedAt":"2026-10-01T23:03:32.773Z","slug":"CVE-2026-51876","body":"## Overview\n\nDeepTutor 1.4.0 contains an authorization bypass vulnerability in the book confirmation flow. An unauthenticated or unauthorized caller can reuse a publicly exposed book_id to submit a confirm-proposal request for an existing book, causing unauthorized overwrites of persisted metadata and spine content.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"abyssal","depthScore":62,"depthScoreParts":{"impact":50.1,"likelihood":0.1,"exploitation":12,"ransomware":0},"changes":[{"seq":216124,"id":"CVE-2026-51876","ts":1791247115414,"field":"exploit_available","old":"false","new":"true"},{"seq":216123,"id":"CVE-2026-51876","ts":1791247115414,"field":"cvss","old":null,"new":"9.1"},{"seq":216122,"id":"CVE-2026-51876","ts":1791247115414,"field":"severity","old":"none","new":"critical"}]}