{"id":"DEBIAN-CVE-2026-70665","details":"Doorkeeper OpenID Connect implements an OpenID Connect authentication provider for Rails applications on top of Doorkeeper. Prior to 1.10.4, the Dynamic Client Registration (DCR) endpoint persists client-supplied scopes without validating them against the server's configured scope set. Under certain conditions, this allows a self-registered client to obtain scopes beyond what the server intended to grant. In DynamicClientRegistrationController#application_params, the scopes attribute is assigned directly from params[:scope] with no validation against Doorkeeper.configuration.scopes or optional_scopes. Combined with enforce_configured_scopes being off by default and Doorkeeper's ScopeChecker prioritizing application-level scopes over server-level scopes, this creates a privilege escalation path. This issue is fixed in version 1.10.4.","modified":"2026-09-10T08:47:33.643076964Z","published":"2026-08-25T23:17:58.933Z","upstream":["CVE-2026-70665"],"references":[{"type":"ADVISORY","url":"https://security-tracker.debian.org/tracker/CVE-2026-70665"}],"affected":[{"package":{"name":"ruby-doorkeeper-openid-connect","ecosystem":"Debian:12","purl":"pkg:deb/debian/ruby-doorkeeper-openid-connect?arch=source&distro=bookworm"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.10.1-1","1.10.5-1","1.8.0-1","1.8.11-1","1.8.11-2","1.8.5-1","1.8.5-2","1.8.7-1","1.9.0-1"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-70665.json"}},{"package":{"name":"ruby-doorkeeper-openid-connect","ecosystem":"Debian:13","purl":"pkg:deb/debian/ruby-doorkeeper-openid-connect?arch=source&distro=trixie"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.10.1-1","1.10.5-1","1.8.11-1","1.8.11-2","1.8.7-1","1.9.0-1"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-70665.json"}},{"package":{"name":"ruby-doorkeeper-openid-connect","ecosystem":"Debian:14","purl":"pkg:deb/debian/ruby-doorkeeper-openid-connect?arch=source&distro=forky"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.10.5-1"}]}],"versions":["1.10.1-1","1.8.11-1","1.8.11-2","1.8.7-1","1.9.0-1"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-70665.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:N"}]}