Description
Mercurius is a GraphQL adapter for Fastify. Any users of Mercurius until version 10.5.0 are subjected to a denial of service attack by sending a malformed packet over WebSocket to `/graphql`. This issue was patched in #940. As a workaround, users can disable subscriptions.
Remediation
References
https://github.com/mercurius-js/mercurius/security/advisories/GHSA-cm8h-q92v-xcfc
https://github.com/mercurius-js/mercurius/pull/940
https://github.com/mercurius-js/mercurius/issues/939