cvedb.io
CVE-2021-43801
HIGH · CVSS 7.5
EPSS exploitation probability: 0%
Published 2021-12-13T20:15:07.577 · Last modified 2026-06-17T04:11:27.953

Summary

Mercurius is a GraphQL adapter for Fastify. Any users from [email protected] to 8.11.1 are subjected to a denial of service attack by sending a malformed JSON to `/graphql` unless they are using a custom error handler. The vulnerability has been fixed in https://github.com/mercurius-js/mercurius/pull/678 and shipped as v8.11.2. As a workaround users may use a custom error handler.

Affected products

mercurius_project — mercurius

Does this affect you?

Add your gear to cvedb and we'll alert you only when mercurius_project ships something exploited.

Check my exposure →

References

This product uses data from the NVD API but is not endorsed or certified by the NVD. Informational only; not professional security advice.