Security advisory

{
  "id": "84fbec94d958f0b9cb6f6a0d78c8bed13d90a732b6b84ae575bac21235bf5258",
  "url": "https://osv.dev/vulnerability/CVE-2016-9954",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2016-9954",
    "summary": "The backtrack compilation code in the Irregex package (aka IrRegular Expressions) before 0.9.6 for Scheme allows remote attackers to cause a denial of service (memory consumption) via a crafted regular expression with a repeating pattern.",
    "evidence": "osv:CVE-2016-9954",
    "products": [],
    "severity": "high",
    "structured": {
      "id": "CVE-2016-9954",
      "aliases": [
        "CVE-2016-9954"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/ashinn/irregex",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "last_affected": "660a5fc00d579e077c72c417ef3ab63831003c08"
                },
                {
                  "fixed": "a16ffc86eca15fca9e40607d41de3cea9cf868f1"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:irregex_project:irregex:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "last_affected": "0.9.5"
                      }
                    ],
                    "source": "CPE_RANGE"
                  },
                  {
                    "range": [
                      {
                        "fixed": "a16ffc86eca15fca9e40607d41de3cea9cf868f1"
                      }
                    ],
                    "source": "REFERENCES_COMMIT"
                  }
                ]
              }
            }
          ],
          "versions": [
            "0.9.5",
            "0.9.4",
            "0.9.3",
            "0.9.2",
            "0.9.1"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2016-9954.json"
          }
        }
      ],
      "modified": "2026-10-20T10:47:32.876968929Z",
      "provider": "osv",
      "references": [
        "https://bugzilla.redhat.com/show_bug.cgi?id=1413990",
        "https://github.com/ashinn/irregex/commit/a16ffc86eca15fca9e40607d41de3cea9cf868f1"
      ],
      "provider_metadata": {}
    },
    "related_cves": [
      {
        "value": "CVE-2016-9954",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 379490,
  "published_at": "2017-04-21T20:59:00.883+00:00"
}