CVE-2025-68158
Authlib: 1-click Account Takeover
HIGH 8.8EPSS 0.3%
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
- authlib
- CVSS v3.1 NVD
- 8.8 HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H - CVSS v3.1 GITHUB
- 5.7 MEDIUM
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:N/A:N - EPSS
- 0.27% chance of exploitation in the next 30 days, 18th percentile
- Published
- 2026-01-08
- Updated
- 2026-03-30
Proof-of-concept exploits (1)
- amc40/browser-interaction-mcp-poc0★ · 2026-10-09
Security advisories
- authlib/authlib/security/advisories/GHSA-fg6f-75jq-6523
- advisories/GHSA-fg6f-75jq-6523
- authlib/authlib/commit/2808378611dd6fb2532b189a9087877d8f0c0489