HashiCorp Nomad and Nomad Enterprise 1.0.17, 1.1.11, and 1.2.5 allow invalid HCL for the jobs parse endpoint, which may cause excessive CPU usage. Fixed in 1.0.18, 1.1.12, and 1.2.6.
The product allocates a reusable resource or group of resources on behalf of an actor without imposing any restrictions on the size or number of resources that can be allocated, in violation of the intended security policy for that actor.