Stuart Douglas I don't know how urgent this issue is to you.

We have released HV 6.0.1.Final and it will be a clear improvement on the version included in WildFly regarding the issue you reported.

If you want to benefit from the improvements, you can use the WildFly patch we have published here:

• For WildFly 10.1.0.Final: http://search.maven.org/remotecontent?filepath=org/hibernate/validator/hibernate-validator-modules/6.0.1.Final/hibernate-validator-modules-6.0.1.Final-wildfly-10.1.0.Final-patch.zip
• For WildFly 11.0.0.Alpha1: http://search.maven.org/remotecontent?filepath=org/hibernate/validator/hibernate-validator-modules/6.0.1.Final/hibernate-validator-modules-6.0.1.Final-wildfly-11.0.0.Alpha1-patch.zip

(we will release a patch for Beta1 with our next minor)

Considering your (lack of) usage of HV in Keycloak, it should be a drop in replacement, I don't expect any issue. We have integration tests running HV 6 on top of WF 10.1 and WF 11.0.

You can apply a patch file automatically when building using the WildFly Maven plugin: https://github.com/hibernate/hibernate-validator/blob/master/integration/pom.xml#L334 .