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.
Fix
Patch, vendor advisory and mitigation references on NVD 1
- https://lists.apache.org/thread/2l1r16g79tpxd7fzrzr2q9oscwrjgljs Mailing List, Vendor Advisory
Every line above is quoted from NVD, CISA, Microsoft, the vendor's own advisory or DISA; nothing is generated.
Change history 1
- First seenCVSS 9.1 · apacheNVD modified 2026-10-23 21:10
Affected (CPE criteria) 1
cpe:2.3:a:apache:cxf:*:*:*:*:*:*:*:*
References 2
- https://lists.apache.org/thread/2l1r16g79tpxd7fzrzr2q9oscwrjgljs Mailing List, Vendor Advisory
- http://www.openwall.com/lists/oss-security/2026/08/06/21