Security advisory

{
  "id": "d886d1dd6345eab8c87caf1e8cae3fed00e58036f75424d17e5feef8c785d8d5",
  "url": "https://osv.dev/vulnerability/CVE-2018-21027",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2018-21027",
    "summary": "Boa through 0.94.14rc21 allows remote attackers to trigger an out-of-memory (OOM) condition because malloc is mishandled.",
    "evidence": "osv:CVE-2018-21027",
    "products": [],
    "severity": "critical",
    "structured": {
      "id": "CVE-2018-21027",
      "aliases": [
        "CVE-2018-21027"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/gpg/boa",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "last_affected": "7d0aa0391a30625856398a49e6a42342e2d14e4b"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "last_affected": "0.94.14rc21"
                      }
                    ],
                    "source": "DESCRIPTION"
                  }
                ]
              }
            }
          ],
          "versions": [
            "upstream/0.94.14rc21",
            "upstream/0.94.14rc20",
            "upstream/0.94.11",
            "upstream/0.94.8.3",
            "upstream/0.93.15",
            "upstream/0.93.14.1",
            "upstream/0.92"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2018-21027.json"
          }
        }
      ],
      "modified": "2026-10-20T10:50:25.162097887Z",
      "provider": "osv",
      "references": [
        "https://github.com/gpg/boa/pull/1",
        "https://github.com/gpg/boa/pull/1/commits/e139b87835994d007fbd64eead6c1455d7b8cf4e"
      ],
      "provider_metadata": {
        "unresolved_ranges": [
          {
            "cpes": [
              "cpe:2.3:a:boa:boa:*:*:*:*:*:*:*:*"
            ],
            "vendor_product": "boa:boa",
            "extracted_events": [
              {
                "range": [
                  {
                    "last_affected": "0.94.14.21"
                  }
                ],
                "source": "CPE_RANGE"
              }
            ]
          }
        ]
      }
    },
    "related_cves": [
      {
        "value": "CVE-2018-21027",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 381698,
  "published_at": "2019-10-11T20:15:16.783+00:00"
}