# mercurius (npm) vulnerabilities

4 known vulnerabilities (1 high, 2 medium, 1 low), with the versions each affects and the releases that fix them.

## At a glance

- Latest release: not known (cve.now hasn't read this package's releases)
- Newest unaffected release: not known without release data
- Registry: https://www.npmjs.com/package/mercurius

## Advisories (4)

### [CVE-2026-30241](https://cve.now/CVE-2026-30241): Mercurius: queryDepth limit bypassed for WebSocket subscriptions

- Severity: Low 2.7
- Published: Mar 6, 2026
- Affected: fixed in 16.8.0.

### [CVE-2025-64166](https://cve.now/CVE-2025-64166): Mercurius: Incorrect Content-Type parsing can lead to CSRF attack

- Severity: Medium 5.4
- Published: Mar 5, 2026
- Affected: fixed in 16.4.0.

### [CVE-2023-22477](https://cve.now/CVE-2023-22477): Mercurius is vulnerable to denial of service (DoS) when using subscriptions

- Severity: Medium 5.3
- Published: Jan 9, 2023
- Affected: from 9.0.0, fixed in 11.5.0; fixed in 8.13.2.

### [CVE-2021-43801](https://cve.now/CVE-2021-43801): Uncaught Exception in mercurius

- Severity: High 7.5
- Published: Dec 13, 2021
- Affected: from 8.10.0, fixed in 8.11.2.

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