Security advisory

{
  "id": "08efc78ec69225ef0ad3772c24c4a2331304619ebf73f58bea313d6364794ad0",
  "url": "https://osv.dev/vulnerability/CVE-2017-18186",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2017-18186",
    "summary": "An issue was discovered in QPDF before 7.0.0. There is an infinite loop due to looping xref tables in QPDF.cc.",
    "evidence": "osv:CVE-2017-18186",
    "products": [],
    "severity": "medium",
    "structured": {
      "id": "CVE-2017-18186",
      "aliases": [
        "CVE-2017-18186"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/qpdf/qpdf",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "0f1ce8e6461d417d1fed2ea4a0cbf27f10ee4eff"
                },
                {
                  "fixed": "85f05cc57ffa0a863d9d9b23e73acea9410b2937"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:qpdf_project:qpdf:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "fixed": "7.0.0"
                      }
                    ],
                    "source": "CPE_RANGE"
                  },
                  {
                    "range": [
                      {
                        "fixed": "85f05cc57ffa0a863d9d9b23e73acea9410b2937"
                      }
                    ],
                    "source": "REFERENCES_COMMIT"
                  }
                ]
              }
            }
          ],
          "versions": [
            "release-qpdf-7.0.b1",
            "release-qpdf-6.0.0",
            "release-qpdf-5.2.0",
            "release-qpdf-5.1.3",
            "release-qpdf-5.1.2",
            "release-qpdf-5.1.1",
            "release-qpdf-5.1.0",
            "release-qpdf-5.0.1",
            "release-qpdf-5.0.0",
            "release-qpdf-4.2.0",
            "release-qpdf-4.1.0",
            "release-qpdf-4.0.1",
            "release-qpdf-4.0.0",
            "release-qpdf-3.0.2",
            "release-qpdf-3.0.1",
            "release-qpdf-3.0.0",
            "release-qpdf-3.0.rc1",
            "release-qpdf-2.3.1",
            "release-qpdf-2.3.0",
            "release-qpdf-2.2.4",
            "release-qpdf-2.2.3",
            "release-qpdf-2.2.2",
            "release-qpdf-2.2.1",
            "release-qpdf-2.2.0",
            "release-qpdf-2.2.rc1",
            "release-qpdf-2.1.5",
            "release-qpdf-2.1.4",
            "release-qpdf-2.1.3",
            "release-qpdf-2.1.2",
            "release-qpdf-2.1.1",
            "release-qpdf-2.1",
            "release-qpdf-2.1.rc1",
            "release-qpdf-2.0.6",
            "release-qpdf-2.0.5",
            "release-qpdf-2.0.4",
            "release-qpdf-2.0.3",
            "release-qpdf-2.0.2",
            "release-qpdf-2.0.1",
            "release-qpdf-2.0"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2017-18186.json",
            "vanir_signatures": [
              {
                "id": "CVE-2017-18186-bb259821",
                "digest": {
                  "length": 1526,
                  "function_hash": "143470664312351326887922365433873313335"
                },
                "source": "https://github.com/qpdf/qpdf/commit/85f05cc57ffa0a863d9d9b23e73acea9410b2937",
                "target": {
                  "file": "libqpdf/QPDF.cc",
                  "function": "QPDF::read_xref"
                },
                "deprecated": false,
                "signature_type": "Function",
                "signature_version": "v1"
              },
              {
                "id": "CVE-2017-18186-be9f9cba",
                "digest": {
                  "threshold": 0.9,
                  "line_hashes": [
                    "266438603850559179889971379008137572864",
                    "170858492933963275451002373626649560772",
                    "86906268882115607882227833084113952493",
                    "29964010784280242289628928258739117002",
                    "78468669523777775192181095830342106787",
                    "148108207355360572343990471531997700227",
                    "76475920812149409294602624238930904875",
                    "168508622536348576714227445013227533227",
                    "79954515655412324376867276884929413567",
                    "336149513343406209498739849406371991950"
                  ]
                },
                "source": "https://github.com/qpdf/qpdf/commit/85f05cc57ffa0a863d9d9b23e73acea9410b2937",
                "target": {
                  "file": "libqpdf/QPDF.cc"
                },
                "deprecated": false,
                "signature_type": "Line",
                "signature_version": "v1"
              }
            ],
            "vanir_signatures_modified": "2026-10-20T13:21:18Z"
          }
        }
      ],
      "modified": "2026-10-20T13:21:18.208348564Z",
      "provider": "osv",
      "references": [
        "https://usn.ubuntu.com/3638-1/",
        "https://github.com/qpdf/qpdf/commit/85f05cc57ffa0a863d9d9b23e73acea9410b2937",
        "https://github.com/qpdf/qpdf/issues/149"
      ],
      "provider_metadata": {}
    },
    "related_cves": [
      {
        "value": "CVE-2017-18186",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 387559,
  "published_at": "2018-02-13T19:29:00.463+00:00"
}