{"id":"UBUNTU-CVE-2025-68158","details":"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.","modified":"2026-09-16T14:01:31.483204221Z","published":"2026-01-08T18:15:00Z","related":["USN-8065-1"],"upstream":["CVE-2025-68158"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2025-68158"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2025-68158"},{"type":"REPORT","url":"https://github.com/authlib/authlib/security/advisories/GHSA-fg6f-75jq-6523"},{"type":"REPORT","url":"https://github.com/authlib/authlib/commit/2808378611dd6fb2532b189a9087877d8f0c0489"},{"type":"REPORT","url":"https://github.com/authlib/authlib/commit/7974f45e4d7492ab5f527577677f2770ce423228"},{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-8065-1"}],"affected":[{"package":{"name":"python-authlib","ecosystem":"Ubuntu:Pro:24.04:LTS","purl":"pkg:deb/ubuntu/python-authlib?arch=source&distro=esm-apps%2Fnoble"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.3.0-1ubuntu0.1~esm1"}]}],"versions":["1.2.1-1","1.3.0-1"],"ecosystem_specific":{"binaries":[{"binary_name":"python3-authlib","binary_version":"1.3.0-1ubuntu0.1~esm1"}],"availability":"Available with Ubuntu Pro: https://ubuntu.com/pro"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2025/UBUNTU-CVE-2025-68158.json"}},{"package":{"name":"python-authlib","ecosystem":"Ubuntu:25.10","purl":"pkg:deb/ubuntu/python-authlib?arch=source&distro=questing"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.5.1-1","1.5.2-1","1.6.0-1"],"ecosystem_specific":{"binaries":[{"binary_name":"python3-authlib","binary_version":"1.6.0-1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2025/UBUNTU-CVE-2025-68158.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:N/A:N"},{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H"},{"type":"Ubuntu","score":"medium"}]}