Security advisory

{
  "id": "7dddf5e9c016dc9ed858d6a89ad0b6e4a1b50a53da06a212c1e3c2dd021d98e0",
  "url": "https://osv.dev/vulnerability/CVE-2021-23423",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2021-23423",
    "summary": "This affects the package bikeshed before 3.0.0. This can occur when an untrusted source file containing include, include-code or include-raw block is processed. The contents of arbitrary files could be disclosed in the HTML output.",
    "evidence": "osv:CVE-2021-23423",
    "products": [],
    "severity": "high",
    "structured": {
      "id": "CVE-2021-23423",
      "aliases": [
        "CVE-2021-23423",
        "GHSA-hf6p-4rv2-9qrp",
        "PYSEC-2021-117",
        "SNYK-PYTHON-BIKESHED-1537647"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/speced/bikeshed",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "b2f668fca204260b1cad28d5078e93471cb6b2dd"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "range": [
                      {
                        "fixed": "b2f668fca204260b1cad28d5078e93471cb6b2dd"
                      }
                    ],
                    "source": "REFERENCES_COMMIT"
                  }
                ]
              }
            }
          ],
          "versions": [
            "v0.9"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-23423.json"
          }
        }
      ],
      "modified": "2026-10-20T10:53:43.878828845Z",
      "provider": "osv",
      "references": [
        "https://github.com/tabatkins/bikeshed/commit/b2f668fca204260b1cad28d5078e93471cb6b2dd",
        "https://snyk.io/vuln/SNYK-PYTHON-BIKESHED-1537647"
      ],
      "provider_metadata": {
        "unresolved_ranges": [
          {
            "cpes": [
              "cpe:2.3:a:bikeshed_project:bikeshed:*:*:*:*:*:*:*:*"
            ],
            "vendor_product": "bikeshed_project:bikeshed",
            "extracted_events": [
              {
                "range": [
                  {
                    "fixed": "3.0.0"
                  }
                ],
                "source": "CPE_RANGE"
              }
            ]
          },
          {
            "extracted_events": [
              {
                "range": [
                  {
                    "fixed": "3.0.0"
                  }
                ],
                "source": "DESCRIPTION"
              }
            ]
          }
        ]
      }
    },
    "related_cves": [
      {
        "value": "CVE-2021-23423",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 384551,
  "published_at": "2021-08-16T08:15:11.393+00:00"
}