{"schema_version": "1.6.1", "id": "CVE-2026-61466", "summary": "OAuth2 Dynamic Client Registration Scope Self-Escalation", "details": "In Apache CXF's OAuth2 Dynamic Client Registration endpoint, the authorization server accepts and stores the `scope` value supplied in the client registration request verbatim, without validating it against an AS-defined allowlist. This could lead to a client self-assigning privileged scopes at registration time. Users are recommended to upgrade to versions 4.2.3 or 4.1.8 or 3.6.12, which fix this issue.", "affected": [{"ranges": [{"type": "SEMVER", "events": [{"introduced": "0"}, {"fixed": "3.6.12"}]}, {"type": "SEMVER", "events": [{"introduced": "4.0.0"}, {"fixed": "4.1.8"}]}, {"type": "SEMVER", "events": [{"introduced": "4.2.0"}, {"fixed": "4.2.3"}]}]}], "references": [{"type": "WEB", "url": "https://lists.apache.org/thread/2l1r16g79tpxd7fzrzr2q9oscwrjgljs"}]}