CVE-2018-12121Node.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…
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It affects The Node.js Project Node.js and 8 other products. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
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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.
- CVSS
- 7.5 HIGH (v3.1, NVD)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- Weakness (CWE)
- CWE-400
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- nodejs
- NVD analysis
- Modified
- Record last updated
- Oct 8, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
The Node.js Project Node.js node.js_project:node.js (from the name) | All versions prior to Node.js 6.15.0, 8.14.0, 10.14.0 and 11.3.0 | CNA record |
nodejs node.js nodejs:node.js | from 6.0.0 before 6.15.0; from 8.0.0 before 8.14.0; from 10.0.0 before 10.14.0; from 11.0.0 before 11.3.0 | NVD |
redhat enterprise_linux redhat:enterprise_linux | 8.0 | NVD |
redhat enterprise_linux_desktop redhat:enterprise_linux_desktop | 7.0 | NVD |
redhat enterprise_linux_eus redhat:enterprise_linux_eus | 8.1; 8.2; 8.4; 8.6 | NVD |
redhat enterprise_linux_server redhat:enterprise_linux_server | 7.0 | NVD |
redhat enterprise_linux_server_aus redhat:enterprise_linux_server_aus | 8.2; 8.4; 8.6 | NVD |
redhat enterprise_linux_server_tus redhat:enterprise_linux_server_tus | 8.2; 8.4; 8.6 | NVD |
redhat enterprise_linux_workstation redhat:enterprise_linux_workstation | 7.0 | NVD |
References
- https://nodejs.org/en/blog/vulnerability/november-2018-security-releases/x-refsource-confirm
- http://www.securityfocus.com/bid/106043vdb-entry, x-refsource-bid
- https://access.redhat.com/errata/RHSA-2019:1821vendor-advisory, x-refsource-redhat
- https://access.redhat.com/errata/RHSA-2019:2258vendor-advisory, x-refsource-redhat
- https://access.redhat.com/errata/RHSA-2019:3497vendor-advisory, x-refsource-redhat
- https://security.gentoo.org/glsa/202003-48vendor-advisory, x-refsource-gentoo
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.