Apache CXF up to 3.6.11/4.1.7/4.2.2 Dynamic Client Registration privileges management

Summaryinfo

A vulnerability classified as critical has been found in Apache CXF up to 3.6.11/4.1.7/4.2.2. This affects an unknown part of the component Dynamic Client Registration. Performing a manipulation results in privileges management. This vulnerability was named CVE-2026-61466. The attack may be initiated remotely. There is no available exploit.

Detailsinfo

A vulnerability, which was classified as critical, was found in Apache CXF up to 3.6.11/4.1.7/4.2.2. This affects some unknown processing of the component Dynamic Client Registration. The manipulation with an unknown input leads to a privileges management vulnerability. CWE is classifying the issue as CWE-269. The product does not properly assign, modify, track, or check privileges for an actor, creating an unintended sphere of control for that actor. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE 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 advisory is shared at lists.apache.org. This vulnerability is uniquely identified as CVE-2026-61466 since 07/09/2026. The exploitability is told to be easy. It is possible to initiate the attack remotely. Neither technical details nor an exploit are publicly available. The price for an exploit might be around USD $0-$5k at the moment (estimation calculated on 08/06/2026). MITRE ATT&CK project uses the attack technique T1068 for this issue.

Upgrading to version 3.6.12, 4.1.8 or 4.2.3 eliminates this vulnerability.

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Productinfo

Type

• Application Server Software

Vendor

• Apache

Name

• CXF

Version

• 3.6.0
• 3.6.1
• 3.6.2
• 3.6.3
• 3.6.4
• 3.6.5
• 3.6.6
• 3.6.7
• 3.6.8
• 3.6.9
• 3.6.10
• 3.6.11
• 4.1.0
• 4.1.1
• 4.1.2
• 4.1.3
• 4.1.4
• 4.1.5
• 4.1.6
• 4.1.7
• 4.2.0
• 4.2.1
• 4.2.2

License

• open-source

Website

• Vendor: https://www.apache.org/

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Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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