Unknown [CVE-2026-61466] 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 security Apache Software Foundation advisory covers CVE-2026-61466 affecting Apache CXF.
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Summary
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.
- Apache CXF before 3.6.12
- Apache CXF 4.0.0 before 4.1.8
- Apache CXF 4.2.0 before 4.2.3
Official advisory · medium-confidence parse· fetched 2 hours ago·verify at source
- 4.2.3
- 4.1.8
- 3.6.12
Official advisory · medium-confidence parse· fetched 2 hours ago·verify at source
Mitigation checklist
- Users are recommended to upgrade to versions 4.2.3 or 4.1.8 or 3.6.12, which fix this issue.
Official advisory · medium-confidence parse· fetched 2 hours ago·verify at source
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