CVE-2025-68158
MEDIUM
GHSA-fg6f-75jq-6523
CVSS Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:N/A:N
Lifecycle Timeline
4Description
Authlib is a Python library which builds OAuth and OpenID Connect servers. In version 1.6.5 and prior, cache-backed state/request-token storage is not tied to the initiating user session, so CSRF is possible for any attacker that has a valid state (easily obtainable via an attacker-initiated authentication flow). When a cache is supplied to the OAuth client registry, FrameworkIntegration.set_state_data writes the entire state blob under _state_{app}_{state}, and get_state_data ignores the caller’s session altogether. This issue has been patched in version 1.6.6.
Analysis
Authlib is a Python library which builds OAuth and OpenID Connect servers. [CVSS 5.7 MEDIUM]
Technical Context
Classified as CWE-352 (Cross-Site Request Forgery (CSRF)). Affects Authlib. Authlib is a Python library which builds OAuth and OpenID Connect servers. In version 1.6.5 and prior, cache-backed state/request-token storage is not tied to the initiating user session, so CSRF is possible for any attacker that has a valid state (easily obtainable via an attacker-initiated authentication flow). When a cache is supplied to the OAuth client registry, FrameworkIntegration.set_state_data writes the entire state blob under _state_{app}_{state}, and get_state_data ignores the caller
Affected Products
Vendor: Authlib. Product: Authlib.
Remediation
A vendor patch is available — apply it immediately. Fixed in version 1.6.6.. Restrict network access to the affected service where possible.
Priority Score
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External POC / Exploit Code
Leaving vuln.today