CVE-2023-22477 - CVE House

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Status published Medium CVE-2023-22477

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

5.3 CVSS

Vulnerability 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.

Impact Analysis

Refer to official advisory for detailed impact metrics.

Remediation

Ensure systems are updated to the latest vendor-supplied patch levels.

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Credits & Attribution

No credits recorded in the NVD database.

References

More from mercurius-js

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Mercurius: Incorrect Content-Type parsing can lead to CSRF attack

Uncaught Exception in mercurius

Affected Vendor

mercurius-js

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Affected Software

mercurius

Vulnerable Versions:

< 10.5.0

Timeline

Official Publish: January 9th, 2023

Last Modified: March 10th, 2025

Added to House: July 22nd, 2026

CVSS Vectors

V3: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

Weaknesses (CWE)

MITRE ATT&CK TTPs

T1190 Exploit Public-Facing Application

T1203 Exploitation for Client Execution

T1213 Data from Information Repositories

T1499.003 Application Exhaustion Flood