A limit of 15 parts for multipart/form-data requests has been configured for the CAE.

Tomcat introduced a new maxPartCount limit with a default of 10 in oder to fix CVE-2025-48988. With the latest Spring Boot versions, a new configuration property was introduced to customize the limit. As some of the CAE implementations require a slightly higher part count, that limit has been increased to 15 in the CAE’s application properties:

server.tomcat.max-part-count=15

Please check Your project’s customizations if that limit requires further increment. This might e.g. be the case for HTML forms with many input fields.

See also:

(CMS-28098)