{"id":"CVE-2026-45274","title":"MyBooks is anebook management web server also known as Talebook","summary":"MyBooks is anebook management web server also known as Talebook. In 3.41.2 and earlier, the SignUp.post handler for POST /api/user/sign_up in webserver/handlers/user.py does not enforce the ALLOW_REGISTER configuration flag, even though …","severity":"medium","cvss":6.9,"cvssVector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N","cwe":["CWE-602"],"vendor":"PoxenStudio","product":"talebook","affected":["talebook < 3.42.0"],"published":"2026-08-19","updated":"2026-09-09","sourceUpdated":"2026-09-09T21:13:25.910","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-45274","references":[{"url":"https://github.com/PoxenStudio/mybooks/commit/a1780c98b00566af7da2fc099fe38500efc02e92","label":"security-advisories@github.com"},{"url":"https://github.com/PoxenStudio/mybooks/releases/tag/3.42.0","label":"security-advisories@github.com"},{"url":"https://github.com/PoxenStudio/mybooks/security/advisories/GHSA-3q85-5vj5-qx5v","label":"security-advisories@github.com"},{"url":"https://github.com/PoxenStudio/mybooks/security/advisories/GHSA-3q85-5vj5-qx5v","label":"134c704f-9b21-4f2e-91b3-4a467353bcc0"}],"tags":["nvd","cve.org","exploit-available"],"exploitAvailable":true,"ssvc":{"exploitation":"poc","automatable":"no","technicalImpact":"partial","timestamp":"2026-08-19T15:22:55.400640Z"},"cvssSource":"cna","ingestedAt":"2026-09-14T02:43:38.951Z","epss":0.00669,"epssPercentile":0.50125,"slug":"CVE-2026-45274","body":"## Overview\n\nMyBooks is anebook management web server also known as Talebook. In 3.41.2 and earlier, the SignUp.post handler for POST /api/user/sign_up in webserver/handlers/user.py does not enforce the ALLOW_REGISTER configuration flag, even though the frontend hides registration controls when the flag is false. An unauthenticated remote attacker can call the endpoint directly and create a valid account on an instance whose administrator disabled public registration. The process_auth_header function in webserver/handlers/base.py also does not verify the account's active flag, so the newly created and unactivated account can authenticate immediately and access user-level API functionality. The bypass defeats the intended account-creation policy and can supply the low-privilege account required by related authorization vulnerabilities. This issue is fixed in version 3.42.0.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"twilight","depthScore":50,"depthScoreParts":{"impact":38,"likelihood":0.1,"exploitation":12,"ransomware":0},"changes":[]}