Security advisory

{
  "id": "40581b78b410bcf8cfe5e446fe4fb1b60fc33eaa96355d24a217ef89b7723507",
  "url": "https://osv.dev/vulnerability/CVE-2021-42576",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2021-42576",
    "summary": "The bluemonday sanitizer before 1.0.16 for Go, and before 0.0.8 for Python (in pybluemonday), does not properly enforce policies associated with the SELECT, STYLE, and OPTION elements.",
    "evidence": "osv:CVE-2021-42576",
    "products": [],
    "severity": "critical",
    "structured": {
      "id": "CVE-2021-42576",
      "aliases": [
        "CVE-2021-42576",
        "GHSA-x95h-979x-cf3j",
        "GO-2022-0588",
        "PYSEC-2021-849"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/microcosm-cc/bluemonday",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "c788a2a4d42e081ad54a31368478820bb4a42fb4"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:microco:bluemonday:*:*:*:*:*:go:*:*",
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "fixed": "1.0.16"
                      }
                    ],
                    "source": "CPE_RANGE"
                  }
                ]
              }
            }
          ],
          "versions": [
            "v1.0.15",
            "v1.0.14",
            "v1.0.13",
            "v1.0.12",
            "v1.0.11",
            "v1.0.10",
            "v1.0.9",
            "v1.0.8",
            "v1.0.7",
            "v1.0.6",
            "v1.0.5",
            "v1.0.4",
            "v1.0.3",
            "v1.0.2",
            "v1.0.1",
            "v1.0.0"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-42576.json"
          }
        }
      ],
      "modified": "2026-10-24T10:30:22.510608868Z",
      "provider": "osv",
      "references": [
        "https://docs.google.com/document/d/11SoX296sMS0XoQiQbpxc5pNxSdbJKDJkm5BDv0zrX50/"
      ],
      "provider_metadata": {
        "unresolved_ranges": [
          {
            "cpes": [
              "cpe:2.3:a:python:pybluemonday:*:*:*:*:*:*:*:*"
            ],
            "vendor_product": "python:pybluemonday",
            "extracted_events": [
              {
                "range": [
                  {
                    "fixed": "0.0.8"
                  }
                ],
                "source": "CPE_RANGE"
              }
            ]
          }
        ]
      }
    },
    "related_cves": [
      {
        "value": "CVE-2021-42576",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 430702,
  "published_at": "2021-10-18T15:15:07.823+00:00"
}