Stack-buffer-overflow in strcat

{
  "id": "8fe6a06460455de28b0c1d438bb277e25191b7e5940543fba985e3eb8a64a1c1",
  "url": "https://osv.dev/vulnerability/OSV-2021-1085",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "Stack-buffer-overflow in strcat",
    "summary": "OSS-Fuzz report: https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=36743 ``` Crash type: Stack-buffer-overflow WRITE {*} Crash state: strcat prvTidystrrep tidyMessageCreateInitV ```",
    "evidence": "osv:OSV-2021-1085",
    "products": [
      {
        "name": {
          "value": "tidy-html5",
          "evidence": "/affected/0/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [],
        "affected_versions": [
          {
            "value": "5.9.14-next",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "5.9.8-next",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "5.9.9-next",
            "evidence": "/affected/0/versions"
          }
        ]
      }
    ],
    "severity": "unknown",
    "structured": {
      "id": "OSV-2021-1085",
      "aliases": [
        "OSV-2021-1085"
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/htacg/tidy-html5.git",
              "type": "GIT",
              "events": [
                {
                  "introduced": "68a3d81d027e0a712bf3c6b93d5e135bd9277bd3"
                }
              ]
            }
          ],
          "package": {
            "name": "tidy-html5",
            "purl": "pkg:generic/tidy-html5",
            "ecosystem": "OSS-Fuzz"
          },
          "versions": [
            "5.9.14-next",
            "5.9.8-next",
            "5.9.9-next"
          ],
          "database_specific": {
            "source": "https://github.com/google/oss-fuzz-vulns/blob/main/vulns/tidy-html5/OSV-2021-1085.yaml"
          },
          "ecosystem_specific": {
            "severity": "HIGH"
          }
        }
      ],
      "modified": "2026-10-19T14:28:05.491402Z",
      "provider": "osv",
      "references": [
        "https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=36743"
      ]
    },
    "related_cves": [],
    "security_relevant": true,
    "severity_evidence": null
  },
  "source_id": "core-osv",
  "document_id": 374801,
  "published_at": "2021-08-02T00:00:16.885038+00:00"
}