CVE-2026-61466

Critical

Description

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.

SeverityCritical

CVSS9.1

Exploit probability—

Product

Apache Cxf

PublishedAug 6, 2026

First seenAug 6, 2026

Weakness typeCWE-304CWE-304

How to fix

Update

apache cxf3.6.12, 4.1.8, 4.2.3 or later

Vendor advisories

lists.apache.org/thread/2l1r16g79tpxd7fzrzr2q9oscwrjgljs

Affected products

Product	Affected versions	Fixed in
apache cxf	v < 3.6.12, 4.0.0 ≤ v < 4.1.8, 4.2.0 ≤ v < 4.2.3	3.6.12, 4.1.8, 4.2.3

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