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nodejs — security advisory

Type: advisorySources: OSVAdvisory ID: DEBIAN-CVE-2018-12121

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.

Products
nodejs
Affected versions
Not specified
Fixed versions
10.15.0~dfsg-6
CVEs
CVE-2018-12121
Confirmed fixed CVEs
Not specified
Updated in this feed
28 Oct 2026, 11:07 UTC · Revision 1

Source evidence

DEBIAN-CVE-2018-12121

core-osv · Original source

Published 28 Nov 2018, 17:29 UTC

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.

osv:DEBIAN-CVE-2018-12121

nodejs

Fixed versions: 10.15.0~dfsg-6

nodejs

Fixed versions: 10.15.0~dfsg-6

nodejs

Fixed versions: 10.15.0~dfsg-6

Complete source record
{
  "id": "79b8c8618679a6f469e7841b5a88c633935d2de0c32f38a3b9d487b397b1533c",
  "url": "https://osv.dev/vulnerability/DEBIAN-CVE-2018-12121",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "DEBIAN-CVE-2018-12121",
    "summary": "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.",
    "evidence": "osv:DEBIAN-CVE-2018-12121",
    "products": [
      {
        "name": {
          "value": "nodejs",
          "evidence": "/affected/0/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "10.15.0~dfsg-6",
            "evidence": "/affected/0/ranges"
          }
        ],
        "affected_versions": []
      },
      {
        "name": {
          "value": "nodejs",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "10.15.0~dfsg-6",
            "evidence": "/affected/1/ranges"
          }
        ],
        "affected_versions": []
      },
      {
        "name": {
          "value": "nodejs",
          "evidence": "/affected/2/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "10.15.0~dfsg-6",
            "evidence": "/affected/2/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "high",
    "structured": {
      "id": "DEBIAN-CVE-2018-12121",
      "aliases": [
        "DEBIAN-CVE-2018-12121"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "10.15.0~dfsg-6"
                }
              ]
            }
          ],
          "package": {
            "name": "nodejs",
            "purl": "pkg:deb/debian/nodejs?arch=source&distro=bookworm",
            "ecosystem": "Debian:12"
          },
          "database_specific": {
            "source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2018-12121.json"
          },
          "ecosystem_specific": {
            "urgency": "unimportant"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "10.15.0~dfsg-6"
                }
              ]
            }
          ],
          "package": {
            "name": "nodejs",
            "purl": "pkg:deb/debian/nodejs?arch=source&distro=trixie",
            "ecosystem": "Debian:13"
          },
          "database_specific": {
            "source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2018-12121.json"
          },
          "ecosystem_specific": {
            "urgency": "unimportant"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "10.15.0~dfsg-6"
                }
              ]
            }
          ],
          "package": {
            "name": "nodejs",
            "purl": "pkg:deb/debian/nodejs?arch=source&distro=forky",
            "ecosystem": "Debian:14"
          },
          "database_specific": {
            "source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2018-12121.json"
          },
          "ecosystem_specific": {
            "urgency": "unimportant"
          }
        }
      ],
      "modified": "2026-10-09T09:47:28.710279787Z",
      "provider": "osv",
      "upstream": [
        "CVE-2018-12121"
      ],
      "references": [
        "https://security-tracker.debian.org/tracker/CVE-2018-12121"
      ]
    },
    "related_cves": [
      {
        "value": "CVE-2018-12121",
        "evidence": "/upstream"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 111556,
  "published_at": "2018-11-28T17:29:00.337+00:00"
}