hoek before 8.5.1 and 9.x before 9.0.3 allows prototype poisoning in the clone function.

hapi is a web and services application framework. When hapi >= 15.0.0 <= 16.1.0 encounters a malformed `accept-encoding` header an uncaught exception is thrown. This may cause hapi to crash or to hang the client connection until the timeout period is reached.

Nes is a websocket extension library for hapi. Hapi is a webserver framework. Versions below and including 6.4.0 have a denial of service vulnerability via an invalid Cookie header. This is only present when websocket authentication is set to `cookie`. Submitting an invalid cookie on the websocket upgrade request will cause the node process to error out.

Hapi versions less than 11.0.0 implement CORS incorrectly and allowed for configurations that at best returned inconsistent headers and at worst allowed cross-origin activities that were expected to be forbidden. If the connection has CORS enabled but one route has it off, and the route is not GET, the OPTIONS prefetch request will return the default CORS headers and then the actual request will go through and return no CORS headers. This defeats the purpose of turning CORS on the route.

Certain input passed into the If-Modified-Since or Last-Modified headers will cause an 'illegal access' exception to be raised. Instead of sending a HTTP 500 error back to the sender, hapi node module before 11.1.3 will continue to hold the socket open until timed out (default node timeout is 2 minutes).

When server level, connection level or route level CORS configurations in hapi node module before 11.1.4 are combined and when a higher level config included security restrictions (like origin), a higher level config that included security restrictions (like origin) would have those restrictions overridden by less restrictive defaults (e.g. origin defaults to all origins `*`).

hoek node module before 4.2.0 and 5.0.x before 5.0.3 suffers from a Modification of Assumed-Immutable Data (MAID) vulnerability via 'merge' and 'applyToDefaults' functions, which allows a malicious user to modify the prototype of "Object" via __proto__, causing the addition or modification of an existing property that will exist on all objects.