What’s Vulnerable › Vulnerabilities

CVE-2025-68158: Authlib: 1-click Account Takeover

• Severity: high (CVSS 8.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2026-01-08 · updated 2026-10-14
• Weakness: CWE-352

Description

Authlib is a Python library which builds OAuth and OpenID Connect servers. In versions 1.0.0 through 1.6.5, 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.

Affected products

• authlib: before 1.6.6 — fixed in 1.6.6

How to fix

Upgrade to a fixed version: authlib 1.6.6. Check the vendor advisory for mitigations.

References

• https://github.com/authlib/authlib/commit/2808378611dd6fb2532b189a9087877d8f0c0489
• https://github.com/authlib/authlib/commit/7974f45e4d7492ab5f527577677f2770ce423228
• https://github.com/authlib/authlib/security/advisories/GHSA-fg6f-75jq-6523
• https://github.com/authlib/authlib/security/advisories/GHSA-fg6f-75jq-6523

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