Security advisory

{
  "id": "a47e2e66881428d3b94d87cb5fc69dd14a10783d59a5482bffb865446d2e08fe",
  "url": "https://osv.dev/vulnerability/CVE-2018-21232",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2018-21232",
    "summary": "re2c before 2.0 has uncontrolled recursion that causes stack consumption in find_fixed_tags.",
    "evidence": "osv:CVE-2018-21232",
    "products": [],
    "severity": "medium",
    "structured": {
      "id": "CVE-2018-21232",
      "aliases": [
        "CVE-2018-21232"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/skvadrik/re2c",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "a058ba18fcfd8136a4c322de2260b35da07dc266"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:re2c:re2c:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "fixed": "2.0"
                      }
                    ],
                    "source": "CPE_RANGE"
                  }
                ]
              }
            }
          ],
          "versions": [
            "1.3",
            "1.2.1",
            "1.2",
            "1.1.1",
            "1.1",
            "1.0.3",
            "1.0.2",
            "1.0.1",
            "1.0",
            "0.16",
            "0.15.3",
            "0.15.2",
            "0.15.1",
            "0.15",
            "0.14",
            "0.13.7.5",
            "0.13.7.4",
            "0.13.7.3",
            "0.13.7.2",
            "0.13.7.1",
            "0.13.6"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2018-21232.json"
          }
        }
      ],
      "modified": "2026-10-20T10:50:09.038677568Z",
      "provider": "osv",
      "references": [
        "https://www.openwall.com/lists/oss-security/2020/04/27/2",
        "https://github.com/skvadrik/re2c/issues/219"
      ],
      "provider_metadata": {}
    },
    "related_cves": [
      {
        "value": "CVE-2018-21232",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 381347,
  "published_at": "2020-04-29T14:15:14.417+00:00"
}