lol-html panics on certain HTML inputs

{
  "id": "b4f00a4ba6a05e0c5bc1a81a1aab7dfff53697cc089e90c5e4ed63c1053d3cb3",
  "url": "https://osv.dev/vulnerability/CVE-2023-4241",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "lol-html panics on certain HTML inputs",
    "summary": "lol-html can cause panics on certain HTML inputs. Anyone processing arbitrary 3rd party HTML with the library is affected.",
    "evidence": "osv:CVE-2023-4241",
    "products": [],
    "severity": "high",
    "structured": {
      "id": "CVE-2023-4241",
      "aliases": [
        "CVE-2023-4241",
        "GHSA-c3x7-354f-4p2x"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/cloudflare/lol-html",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "7967765ff8db27000845ba0a0a9a025ac908a043"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "fixed": "1.1.1"
                      }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "ChangesAt"
                  },
                  {
                    "cpe": "cpe:2.3:a:cloudflare:lol-html:*:*:*:*:*:rust:*:*",
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "fixed": "1.1.1"
                      }
                    ],
                    "source": "CPE_RANGE"
                  }
                ]
              }
            }
          ],
          "versions": [
            "v1.1.0",
            "v1.0.1",
            "v1.0.0",
            "v0.4.0",
            "v0.3.3",
            "v0.3.1",
            "v0.2.0"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2023-4241.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:37.179807856Z",
      "provider": "osv",
      "references": [
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/4xxx/CVE-2023-4241.json",
        "https://github.com/cloudflare/lol-html/security/advisories/GHSA-c3x7-354f-4p2x",
        "https://nvd.nist.gov/vuln/detail/CVE-2023-4241"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-20"
        ],
        "cna_assigner": "cloudflare",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/4xxx/CVE-2023-4241.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2023-4241",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 504193,
  "published_at": "2023-08-16T10:13:12.564+00:00"
}