Security advisory

{
  "id": "cf708e41307d9f391125e5716af97afa643bdd81c0c9bbc0e5a15a5f1267936f",
  "url": "https://osv.dev/vulnerability/CVE-2016-6872",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2016-6872",
    "summary": "Integer overflow in StringUtil::implode in Facebook HHVM before 3.15.0 allows attackers to have unspecified impact via unknown vectors.",
    "evidence": "osv:CVE-2016-6872",
    "products": [],
    "severity": "critical",
    "structured": {
      "id": "CVE-2016-6872",
      "aliases": [
        "CVE-2016-6872"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/facebook/hhvm",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "last_affected": "c6bf714e6468213eed377527b431e9cd4cec1432"
                },
                {
                  "fixed": "2c9a8fcc73a151608634d3e712973d192027c271"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:facebook:hhvm:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "last_affected": "3.14.5"
                      }
                    ],
                    "source": "CPE_RANGE"
                  },
                  {
                    "range": [
                      {
                        "fixed": "2c9a8fcc73a151608634d3e712973d192027c271"
                      }
                    ],
                    "source": "REFERENCES_COMMIT"
                  }
                ]
              }
            }
          ],
          "versions": [
            "HHVM-3.14.5",
            "HHVM-3.14.4",
            "HHVM-3.14.3",
            "HHVM-3.14.2",
            "HHVM-3.14.1",
            "HHVM-3.14.0",
            "gcc-4.6",
            "HPHP-2.1.0",
            "src-hphp",
            "pre-hhvm"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2016-6872.json",
            "vanir_signatures": [
              {
                "id": "CVE-2016-6872-ff462bff",
                "digest": {
                  "threshold": 0.9,
                  "line_hashes": [
                    "238431082941683571881043329064853029846",
                    "90012039958666104044987661821392023337",
                    "99491763227833211429850463633399313271",
                    "114462067825914996416718107681050641214",
                    "333721075058452031515053542804959195010"
                  ]
                },
                "source": "https://github.com/facebook/hhvm/commit/2c9a8fcc73a151608634d3e712973d192027c271",
                "target": {
                  "file": "hphp/runtime/base/string-util.cpp"
                },
                "deprecated": false,
                "signature_type": "Line",
                "signature_version": "v1"
              }
            ],
            "vanir_signatures_modified": "2026-10-20T13:22:45Z"
          }
        }
      ],
      "modified": "2026-10-20T13:22:45.829501080Z",
      "provider": "osv",
      "references": [
        "https://github.com/facebook/hhvm/commit/2c9a8fcc73a151608634d3e712973d192027c271"
      ],
      "provider_metadata": {}
    },
    "related_cves": [
      {
        "value": "CVE-2016-6872",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 387590,
  "published_at": "2017-02-17T17:59:01.047+00:00"
}