Jawn is an open source JSON parser. Extenders of the
org.typelevel.jawn.MutableFacade who don't override
objectContext() are vulnerable to a hash collision attack which may result in a denial of service. Most applications do not implement these traits directly, but inherit from a library.
jawn-parser-1.3.1 fixes this issue and users are advised to upgrade. For users unable to upgrade override
objectContext() to use a collision-safe collection.