CVE-2024-37890
nodejs-ws: denial of service when handling a request with many HTTP headers
Severity
ModerateRed Hat Product Security
CVSS 3.1
Review impact separately from score.
Published · June 16, 2024
Updated · October 23, 2026
Description
A flaw was found in the Node.js WebSocket library (ws). A request with several headers exceeding the 'server.maxHeadersCount' threshold could be used to crash a ws server, leading to a denial of service.
CVSS score applicability
The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.
Mitigation
The issue can be mitigated by reducing the maximum allowed length of the request headers using the --max-http-header-size=size or the maxHeaderSize options so that no more headers than the server.maxHeadersCount limit can be sent. The issue can be mitigated also by seting server.maxHeadersCount to 0.
CVSS / CWE
CVSS 3.1 · 5.9CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
CWE-770 · Allocation of Resources Without Limits or Throttling