Critical 9.1Published Aug 6, 2026

CVE-2026-61466Apache CXF: OAuth2 Dynamic Client Registration Scope Self-Escalation

Updated under an hour ago (Oct 27, 2026, 8:25 PM ET)

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It affects Apache Software Foundation Apache CXF and 1 other product. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

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Every CVE for Apache Software Foundation Apache CXF

Exploited in the last 30 days

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.

CVSS: 9.1 CRITICAL (v3.1, CISA ADP)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
Weakness (CWE): CWE-304
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: apache
NVD analysis: Modified
Record last updated: Aug 6, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

Apache Software Foundation Apache CXF apache_software_foundation:apache_cxf (from the name)	before 3.6.12; from 4.0.0 before 4.1.8; from 4.2.0 before 4.2.3	CNA record
apache cxf apache:cxf	before 3.6.12; from 4.0.0 before 4.1.8; from 4.2.0 before 4.2.3	NVD

References

References

https://lists.apache.org/thread/2l1r16g79tpxd7fzrzr2q9oscwrjgljs	vendor-advisory, mailing-list
http://www.openwall.com/lists/oss-security/2026/08/06/21

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.