CVE-2018-12121: Node.js

High severity, CVSS 7.5. EPSS: 10.2% chance of exploitation in the next 30 days.

Node.js: All versions prior to Node.js 6.15.0, 8.14.0, 10.14.0 and 11.3.0: Denial of Service with large HTTP headers: By using a combination of many requests with maximum sized headers (almost 80 KB per connection), and carefully timed completion of the headers, it is possible to cause the HTTP server to abort from heap allocation failure. Attack potential is mitigated by the use of a load balancer or other proxy layer.

Affected products

• Node.js Node.js: from 6.0.0, before 6.15.0 (fixed in 6.15.0); from 8.0.0, before 8.14.0 (fixed in 8.14.0); from 10.0.0, before 10.14.0 (fixed in 10.14.0); from 11.0.0, before 11.3.0 (fixed in 11.3.0)
• Red Hat Enterprise Linux: version 8.0 only
• Red Hat Enterprise Linux Desktop: version 7.0 only
• Red Hat Enterprise Linux Eus: version 8.1 only; version 8.2 only; version 8.4 only; version 8.6 only
• Red Hat Enterprise Linux Server: version 7.0 only
• Red Hat Enterprise Linux Server Aus: version 8.2 only; version 8.4 only; version 8.6 only
• Red Hat Enterprise Linux Server Tus: version 8.2 only; version 8.4 only; version 8.6 only
• Red Hat Enterprise Linux Workstation: version 7.0 only

Published 2018-11-28. Last modified 2026-10-08.