---
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
---

## Overview

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 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.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.