CVE-2026-30241
8.2 · HIGHOverview
CVE-2026-30241 is a high-severity vulnerability affecting mercurius_project mercurius. It was published on March 6, 2026 and has a CVSS 3.1 base score of 8.2 (HIGH).
This vulnerability has a CVSS 3.1 base score of 8.2, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.
Technical Description
Mercurius is a GraphQL adapter for Fastify. Prior to version 16.8.0, Mercurius fails to enforce the configured queryDepth limit on GraphQL subscription queries received over WebSocket connections. The depth check is correctly applied to HTTP queries and mutations, but subscription queries are parsed and executed without invoking the depth validation. This allows a remote client to submit arbitrarily deeply nested subscription queries over WebSocket, bypassing the intended depth restriction. On schemas with recursive types, this can lead to denial of service through exponential data resolution on each subscription event. This issue has been patched in version 16.8.0.
Remediation
Check the references section for vendor advisories and patches from mercurius_project. Update mercurius to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
Affected Products
| Vendor | Product | Versions | Status |
|---|---|---|---|
| mercurius_project | mercurius | >= 0, < 16.8.0 | Affected |
Frequently Asked Questions
What is CVE-2026-30241?
CVE-2026-30241 is a high-severity vulnerability affecting mercurius_project mercurius. It was published on March 6, 2026 and has a CVSS 3.1 base score of 8.2 (HIGH).
How severe is CVE-2026-30241?
This vulnerability has a CVSS 3.1 base score of 8.2, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.
How do I fix or remediate CVE-2026-30241?
Check the references section for vendor advisories and patches from mercurius_project. Update mercurius to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
How can CyberStrike help with CVE-2026-30241?
CyberStrike's AI-powered security agents can automatically detect CVE-2026-30241 across your infrastructure using autonomous pentesting, DAST scanning, and HackBrowser. The platform continuously monitors for known vulnerabilities and provides actionable remediation guidance prioritized by real-world exploitability.
How CyberStrike Helps
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