CVE-2026-61466CWE-304

CVE-2026-61466

Critical · published August 6, 2026

CVSS v3.1
9.1
EPSS
1%
Percentile
53.0
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
9.1 · CRITICAL
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
CVSS v4.0
Not supplied
EPSS
0.00711 · 53.0th percentile
Weakness
CWE-304 · Missing Critical Step in Authentication
Published
2026-08-06T16:16Z
Affected products (3)
ProductVersionsFixed in
apache/cxf< 3.6.123.6.12
apache/cxf≥ 4.0.0, < 4.1.84.1.8
apache/cxf≥ 4.2.0, < 4.2.34.2.3
References (2)
https://lists.apache.org/thread/2l1r16g79tpxd7fzrzr2q9oscwrjgljs · [email protected]http://www.openwall.com/lists/oss-security/2026/08/06/21 · af854a3a-2127-422b-91ae-364da2661108
EPSS history
Timeline
  • 06 AUG 11:24Z
    Apache CXF: OAuth2 Dynamic Client Registration Scope Self-Escalation
    cvelistv5