CVE-2023-22477

Mercurius is vulnerable to denial of service (DoS) when using subscriptions

State: Published
Severity: 5.3 Medium
Published: Jan 9, 2023
Updated: Mar 10, 2025
Reserved: Dec 29, 2022

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.

Scores

CVSS	Score	Vector	Source
3.1	5.3 Medium	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L	GitHub_M

Weaknesses

CWE-248 Uncaught Exception

Affected Products

Product	Versions
mercuriusmercurius-js	< 10.5.0Affected

References

https://github.com/mercurius-js/mercurius/security/advisories/GHSA-cm8h-q92v-xcfc
https://github.com/mercurius-js/mercurius/issues/939
https://github.com/mercurius-js/mercurius/pull/940

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