CVE-2026-45273
HighCVSS 8.7Exploitation Probability (EPSS)
Low risk42th percentile - higher than 42% of all known CVEs
Summary
MyBooks (Talebook) in version 3.41.2 and earlier has a vulnerability in the AdminSettings.post handler for POST /api/admin/settings, which does not check the self.admin_user property despite having the auth decorator. Any authenticated regular user can overwrite server configuration values including SMTP credentials, OAuth client secrets, storage paths, and security feature flags. Additionally, the process_auth_header function fails to verify the account's active flag, allowing unactivated accounts to authenticate. This issue is fixed in version 3.42.0.
Risk Assessment
The vulnerability allows unauthorized configuration changes, secret disclosure, application sabotage, and can be leveraged for code injection attacks.
Recommendation
Update MyBooks to version 3.42.0 or later.
Other vulnerabilities in MyBooks
See all- CVE-2026-45272Critical
MyBooks (Talebook) in version 3.41.2 and earlier contains a vulnerability in the handling of SOCIAL_AUTH key names in the AdminSettings.post handler. These names are concatenated without proper escaping into the auto.py file, allowing an administrator to inject arbitrary Python code. The code is executed during module import, enabling command execution with service privileges.
- CVE-2026-45274Medium
MyBooks (Talebook) version 3.41.2 and earlier does not enforce the ALLOW_REGISTER configuration flag in the SignUp.post handler, allowing an unauthenticated attacker to create an account even when the administrator disabled public registration. Additionally, the process_auth_header function does not verify the account's active flag, so a newly created unactivated account can authenticate immediately and access user-level API functionality. This issue is fixed in version 3.42.0.
Original NVD description (English source)
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.
Vulnerability data from NVD (NIST) · CISA KEV · EPSS