Vulnerability in Mercurius-Js Mercurius

CVE-2023-22477

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.

EPSS: 0.011 (61.0th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L.

Affected products

Weakness classification (CWE)

Public proof-of-concept exploits

References

Frequently asked questions

What is CVE-2023-22477?
CVE-2023-22477 is a medium-severity vulnerability in Mercurius-Js Mercurius, classified under CWE-248. CVSS score: 5.3/10. Published 2023-01-09.
How severe is CVE-2023-22477?
Medium severity. CVSS v3 base score is 5.3 out of 10.
Is CVE-2023-22477 known to be exploited?
3 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.