CVE-2023-22477

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

Published Jan 9, 2023 CVSS 3.1 · 5.3 Medium EPSS 1.1% KEV · Not listed
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

No solution or workaround provided in the CVE record

Tracking

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Advisories

Source ID Title
EUVD EUVD EUVD-2023-0446 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.
Github GHSA Github GHSA GHSA-cm8h-q92v-xcfc mercurius has Uncaught Exception when using subscriptions
History
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'poc', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
GitHub_M
Published
Updated
Mar 10, 2025, 9:31 PM
Reserved
Dec 29, 2022, 5:41 PM
Status
Modified
Published
Jan 9, 2023, 3:15 PM
Modified
Jun 17, 2026, 5:35 AM