Bug 2511991 (CVE-2026-61466) - CVE-2026-61466 cxf: Apache CXF: Privilege Escalation via OAuth2 Dynamic Client Registration Scope Self-Assignment
Summary: CVE-2026-61466 cxf: Apache CXF: Privilege Escalation via OAuth2 Dynamic Clien...
Keywords:
Status: NEW
Alias: CVE-2026-61466
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Product Security
QA Contact:
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Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-08-06 11:52 UTC by OSIDB Bzimport
Modified: 2026-08-27 11:27 UTC (History)
16 users (show)

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Description OSIDB Bzimport 2026-08-06 11:52:04 UTC 
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.
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