An incomplete fix for CVE-2026-50645 means that it is still possible to perform a denial of service attack on Apache CXF by sending a message with many attachment headers. Users are recommended to upgrade to versions 4.2.3 or 4.1.8 or 3.6.12, which fix this issue.

The version of Apache CXF installed on the remote host is prior to 3.6.12, or 4.x prior to 4.1.8, or 4.2.x prior to 4.2.3. It is, therefore, affected by multiple vulnerabilities, including:

  - The JMS transport deserializes the body of any inbound JMS ObjectMessage using native Java deserialization, with     no type restrictions in place. An attacker able to place a message on the service's JMS destination can submit a     malicious serialized object, leading to denial of service or remote code execution. (CVE-2026-66909)

  - In DefaultEncryptingCodeDataProvider, a captured authorization code can be redeemed an unlimited number of times     due to a flaw in the implementation of the removeCodeGrant functionality, violating the RFC requirement that the     authorization code must not be used more than once. (CVE-2026-68079)

  - The OAuth2 Dynamic Client Registration endpoint 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. (CVE-2026-61466)

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The version of IBM WebSphere Application Server running on the remote host is affected by multiple vulnerabilities as referenced in the 7283567 advisory.

  - An incomplete fix for CVE-2026-50645 means that it is still possible to perform a denial of service attack     on Apache CXF by sending a message with many attachment headers. Users are recommended to upgrade to     versions 4.2.3 or 4.1.8 or 3.6.12, which fix this issue. (CVE-2026-64958)

  - Apache CXF allows to set a limit on the number of form parameters in a JAX-RS message via the     maxFormParameterCount configuration option. However, no default limit is set which may lead to denial of     service attacks when processing requests with very large numbers of form parameters. Users are recommended     to upgrade to versions 4.2.3 or 4.1.8 or 3.6.12, which fix this issue by using a default limit of 500     parameters. (CVE-2026-57819)

  - Apache CXF allows to control the maximum attachment size via the attachment-max-size. Prior to Apache     CXF 4.2.3 and 4.1.8 and 3.6.12, there was no default placed on this size, meaning that a denial of service     attack is possible if the user doesn't explicitly set the limit. Users should update to Apache CXF 4.2.3     or 4.1.8 or 3.6.12 which fixes this problem by imposing a default attachment size limit of 50mb.
    (CVE-2026-54225)

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

ID	Name	Product	Family	Type	Severity
335183	Apache CXF < 3.6.12 / 4.x < 4.1.8 / 4.2.x < 4.2.3 Multiple Vulnerabilities	Nessus	Misc.	Local	critical
334999	IBM WebSphere Application Server 9.x < 9.0.5.29 / Liberty 17.0.0.3 < 26.0.0.9 (7283567)	Nessus	Web Servers	Combined	high

Detections

Analytics

CVE-2026-64958

high

Tenable Plugins

critical

high