CVE-2023-22477

HighCVSS 7.5/10Last modified Jun 17, 2026

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.

Metrics

CVSS 3.1 7.5/10CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Weakness enumeration

CWE-248

Affected software

Vendor	Product	Versions
mercurius-js	mercurius	< 10.5.0

References

https://github.com/mercurius-js/mercurius/issues/939Exploit, Issue Tracking, Third Party Advisory
https://github.com/mercurius-js/mercurius/pull/940Patch, Third Party Advisory
https://github.com/mercurius-js/mercurius/security/advisories/GHSA-cm8h-q92v-xcfcPatch, Third Party Advisory
https://github.com/mercurius-js/mercurius/issues/939Exploit, Issue Tracking, Third Party Advisory
https://github.com/mercurius-js/mercurius/pull/940Patch, Third Party Advisory
https://github.com/mercurius-js/mercurius/security/advisories/GHSA-cm8h-q92v-xcfcPatch, Third Party Advisory

Timeline

Published: Jan 9, 2023
Last modified: Jun 17, 2026
NVD status: Modified

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