Security advisory

{
  "id": "9a7f072ae30d31561777d2d207a9c86a4ff9c3beeeb4aea3d6c5bf3c30e6e858",
  "url": "https://osv.dev/vulnerability/CVE-2020-26303",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2020-26303",
    "summary": "insane is a whitelist-oriented HTML sanitizer. Versions 2.6.2 and prior contain one or more regular expressions that are vulnerable to Regular Expression Denial of Service (ReDoS). As of time of publication, no known patches are available.",
    "evidence": "osv:CVE-2020-26303",
    "products": [],
    "severity": "high",
    "structured": {
      "id": "CVE-2020-26303",
      "aliases": [
        "CVE-2020-26303",
        "GHSA-w455-mfq9-hf74"
      ],
      "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/bevacqua/insane",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "last_affected": "641ad8e9e1e9894eddd24806f1d81acb3550dc1d"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:bevacqua:insane:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "last_affected": "2.6.2"
                      }
                    ],
                    "source": "CPE_RANGE"
                  }
                ]
              }
            }
          ],
          "versions": [
            "v2.6.2",
            "v2.6.1",
            "v2.6.0",
            "v2.5.0",
            "v2.4.3",
            "v2.4.2",
            "v2.4.1",
            "v2.4.0",
            "v2.3.0",
            "v2.2.0",
            "v2.1.2"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2020-26303.json"
          }
        }
      ],
      "modified": "2026-10-20T10:52:58.132655065Z",
      "provider": "osv",
      "references": [
        "https://github.com/bevacqua/insane/issues/19",
        "https://securitylab.github.com/advisories/GHSL-2020-289-redos-insane/"
      ],
      "provider_metadata": {}
    },
    "related_cves": [
      {
        "value": "CVE-2020-26303",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 384101,
  "published_at": "2024-10-26T21:15:13.46+00:00"
}