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CVE-2026-45273— MyBooks: Privilege Escalation via Missing Authorization on Admin Settings Endpoint

Quick assessment

Affected
PoxenStudio talebook
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

MyBooks（又名 Talebook）是一款电子书管理 Web 服务器。在版本 3.41.2 及更早版本中， 文件中的 处理器用于处理对 的 POST 请求。该处理器虽然应用了身份认证装饰器（auth decorator），但并未像对应的 GET 处理器那样检查 属性。因此，任何经过认证的普通用户均可覆盖服务器配置值，包括 SMTP 凭据、OAuth 客户端密钥、存储路径、安全功能标志以及自动重载设置等。 此外， 中的 函数未能验证已匹配账户的“激活状态”（active flag）。这使得即使是一个已注册但未激活

CVSS 8.7 · High EPSS 0.41% · P34

Affected Version Matrix 1

VendorProduct Version RangeStatus
PoxenStudio talebook < 3.42.0 affected
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I. Basic Information for CVE-2026-45273

Vulnerability Information
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Vulnerability Title
MyBooks: Privilege Escalation via Missing Authorization on Admin Settings Endpoint
Source: CVE Program / CVE List V5
Vulnerability Description
MyBooks is an ebook management web server also known as Talebook. In 3.41.2 and earlier, the AdminSettings.post handler for POST /api/admin/settings in webserver/handlers/admin.py applies the auth decorator but does not check the self.admin_user property, unlike the corresponding GET handler. Any authenticated regular user can therefore overwrite server configuration values including SMTP credentials, OAuth client secrets, storage paths, security feature flags, and autoreload settings. The process_auth_header function in webserver/handlers/base.py also fails to verify the matched account's active flag, allowing a registered but unactivated account to authenticate and reach the vulnerable handler. Exploitation can disclose secrets through configuration access paths, sabotage application behavior, force service restarts, and supply the settings needed for related code-injection attacks. 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:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
授权机制缺失
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
PoxenStudio talebook < 3.42.0 -

II. Public POCs for CVE-2026-45273

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Qwen3.6-35B-A3B · 9418 chars
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III. Intelligence Information for CVE-2026-45273

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Patches & Fixes for CVE-2026-45273 (2)

Vendor Advisories for CVE-2026-45273 (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-2026-45274 6.9 MEDIUM MyBooks: Unauthenticated Registration Bypass via Missing Server-Side ALLOW_REGISTER Enforc

IV. Related Vulnerabilities

Same product: talebook
Same vendor: PoxenStudio
Same weakness: CWE-862

V. Comments for CVE-2026-45273

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