{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "extracted_events": [
              {
                "range": [
                  {
                    "introduced": "0"
                  },
                  {
                    "fixed": "4.33.0"
                  }
                ],
                "source": "AFFECTED_FIELD",
                "strategy": "StringRangeExpression"
              },
              {
                "range": [
                  {
                    "introduced": "2.17.7"
                  },
                  {
                    "fixed": "2.18.0"
                  }
                ],
                "source": "AFFECTED_FIELD",
                "strategy": "StringRangeExpression"
              },
              {
                "range": [
                  {
                    "fixed": "9500b8b0e1d630d5e07fbb5fd2c25ed0943845ce"
                  }
                ],
                "source": "REFERENCES_COMMIT"
              },
              {
                "range": [
                  {
                    "fixed": "f84fd41cbf6c22eb8d0008fc9c25df1f7130b350"
                  }
                ],
                "source": "REFERENCES_COMMIT"
              },
              {
                "original_tag": "sanitize-html@2.18.0",
                "range": [
                  {
                    "fixed": "9500b8b0e1d630d5e07fbb5fd2c25ed0943845ce"
                  }
                ],
                "source": "REFERENCES_TAG"
              }
            ]
          },
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "9500b8b0e1d630d5e07fbb5fd2c25ed0943845ce"
            },
            {
              "introduced": "72f4531e7b491738049eec423d0c1c2342828e5f"
            },
            {
              "fixed": "9500b8b0e1d630d5e07fbb5fd2c25ed0943845ce"
            },
            {
              "fixed": "f84fd41cbf6c22eb8d0008fc9c25df1f7130b350"
            }
          ],
          "repo": "https://github.com/apostrophecms/apostrophe",
          "type": "GIT"
        }
      ]
    }
  ],
  "aliases": [
    "GHSA-374f-7chj-9948"
  ],
  "database_specific": {
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
      "CWE-79"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/113xxx/CVE-2026-113657.json"
  },
  "details": "ApostropheCMS is an open-source Node.js content management system, and sanitize-html provides a simple HTML sanitizer with a clear API. From sanitize-html 2.17.7 until 2.18.0, an application configuration that permits namespace-prefixed SVG animation elements and the relevant URL-targeting attributes can bypass the SMIL URL protection because prefixed tag names do not match the unprefixed animation-element check. The bypass can rewrite a link destination to an unsafe URI after the sanitized SVG is rendered, with script execution occurring when a user activates the affected link; the default sanitizer configuration is not unconditionally affected. This issue is fixed in sanitize-html 2.18.0.",
  "id": "CVE-2026-113657",
  "modified": "2026-10-21T02:31:10.747360396Z",
  "published": "2026-10-20T16:54:12.995Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/113xxx/CVE-2026-113657.json"
    },
    {
      "type": "FIX",
      "url": "https://github.com/apostrophecms/apostrophe/commit/9500b8b0e1d630d5e07fbb5fd2c25ed0943845ce"
    },
    {
      "type": "FIX",
      "url": "https://github.com/apostrophecms/apostrophe/commit/f84fd41cbf6c22eb8d0008fc9c25df1f7130b350"
    },
    {
      "type": "WEB",
      "url": "https://github.com/apostrophecms/apostrophe/releases/tag/sanitize-html@2.18.0"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/apostrophecms/apostrophe/security/advisories/GHSA-374f-7chj-9948"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-113657"
    }
  ],
  "schema_version": "1.9.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:L/I:L/A:N",
      "type": "CVSS_V3"
    }
  ],
  "summary": "ApostropheCMS sanitize-html: SMIL animation namespace-prefix bypass allows javascript: URI injection (XSS)"
}