Allocation of Resources Without Limits or Throttling
The package silverstripe/graphql serves Silverstripe data as GraphQL representations. In versions 4.1.1 and 4.2.2, an attacker could use a specially crafted graphql query to execute a Denial of Service attack against a website which has a publicly exposed graphql endpoint. This mostly affects websites with particularly "large/complex" graphql schemas.
CWE-770 - Allocation of Resources Without Limits or Throttling
The software 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.