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 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.

Score

CVSS 3.1 9.1 Critical

Status

Modified - security@apache.org

Published

2026-08-06

Last modified

2026-10-24

Weaknesses

CWE-304

Affected products

• Cxf (Apache)
• Apache Cxf (Apache Software Foundation)

References

• https://lists.apache.org/thread/2l1r16g79tpxd7fzrzr2q9oscwrjgljs
• http://www.openwall.com/lists/oss-security/2026/08/06/21