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CVE-2026-45274— MyBooks: Unauthenticated Registration Bypass via Missing Server-Side ALLOW_REGISTER Enforcement

Quick assessment

Affected
PoxenStudio talebook
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

PoxenStudio talebook是PoxenStudio个人开发者的一款个人图书管理服务器软件。 PoxenStudio talebook 3.42.0之前版本存在处理逻辑错误漏洞，该漏洞源于服务器端未正确执行ALLOW_REGISTER配置标志且未验证账户激活状态，可能导致未经身份验证的远程攻击者直接调用注册接口创建有效账户并绕过激活验证，访问用户级API功能。

CVSS 6.9 · Medium EPSS 0.71% · P53

Affected Version Matrix 1

VendorProduct Version RangeStatus
PoxenStudio talebook < 3.42.0 affected
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I. Basic Information for CVE-2026-45274

Vulnerability Information
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Vulnerability Title
MyBooks: Unauthenticated Registration Bypass via Missing Server-Side ALLOW_REGISTER Enforcement
Source: CVE Program / CVE List V5
Vulnerability Description
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.
Source: CVE Program / CVE List V5
CVSS Information
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
Source: CVE Program / CVE List V5
Vulnerability Type
服务端安全的客户端实施
Source: CVE Program / CVE List V5
Vulnerability Title
PoxenStudio talebook 处理逻辑错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
PoxenStudio talebook是PoxenStudio个人开发者的一款个人图书管理服务器软件。 PoxenStudio talebook 3.42.0之前版本存在处理逻辑错误漏洞，该漏洞源于服务器端未正确执行ALLOW_REGISTER配置标志且未验证账户激活状态，可能导致未经身份验证的远程攻击者直接调用注册接口创建有效账户并绕过激活验证，访问用户级API功能。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
PoxenStudio talebook < 3.42.0 -

II. Public POCs for CVE-2026-45274

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III. Intelligence Information for CVE-2026-45274

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Patches & Fixes for CVE-2026-45274 (2)

Vendor Advisories for CVE-2026-45274 (1)

Same Patch Batch · PoxenStudio · 2026-08-19 · 3 CVEs total

CVE-2026-45272 9.4 CRITICAL MyBooks: Remote Code Execution via SOCIAL_AUTH Key Name Injection in Python Config File
CVE-2026-45273 8.7 HIGH MyBooks: Privilege Escalation via Missing Authorization on Admin Settings Endpoint

IV. Related Vulnerabilities

Same product: talebook
Same vendor: PoxenStudio
Same weakness: CWE-602

V. Comments for CVE-2026-45274

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