{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "extracted_events": [
              {
                "introduced": "0"
              },
              {
                "fixed": "8.6.79"
              },
              {
                "introduced": "9.0.0"
              },
              {
                "fixed": "9.9.1-alpha.4"
              }
            ],
            "source": "AFFECTED_FIELD"
          },
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "d0048ff8d2aef6949ce9cf8fdb042f2420545b89"
            },
            {
              "introduced": "532a461d30a6ed4457839f2caf5f30d5abf51a55"
            },
            {
              "fixed": "2b9d93d224d948430ba68ae8149176abc1fdf86b"
            }
          ],
          "repo": "https://github.com/parse-community/parse-server",
          "type": "GIT"
        }
      ]
    }
  ],
  "aliases": [
    "GHSA-7wqv-xjf3-x35v"
  ],
  "database_specific": {
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
      "CWE-434",
      "CWE-79"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/53xxx/CVE-2026-53724.json"
  },
  "details": "Parse Server is an open source backend that can be deployed to any infrastructure that can run Node.js. Prior to versions 8.6.79 and 9.9.1-alpha.4, the default file upload extension blocklist can be bypassed by appending a trailing dot to a filename whose extension would otherwise be blocked (e.g. poc.svg.). The trailing dot causes the extension parser to extract an empty string, which short-circuits the blocklist check, and the attacker-controlled Content-Type is forwarded to the storage adapter unchanged. Storage adapters that persist and serve the provided Content-Type (such as S3 or GCS) then serve the file with an active type such as image/svg+xml, enabling stored XSS when a victim opens the file URL. The default GridFS adapter is not affected because it sets X-Content-Type-Options: nosniff on responses. This issue has been patched in versions 8.6.79 and 9.9.1-alpha.4.",
  "id": "CVE-2026-53724",
  "modified": "2026-07-15T01:48:58.720544685Z",
  "published": "2026-06-12T18:34:38.237Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/53xxx/CVE-2026-53724.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/parse-community/parse-server/security/advisories/GHSA-7wqv-xjf3-x35v"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-53724"
    },
    {
      "type": "FIX",
      "url": "https://github.com/parse-community/parse-server/pull/10489"
    },
    {
      "type": "FIX",
      "url": "https://github.com/parse-community/parse-server/pull/10490"
    }
  ],
  "schema_version": "1.8.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:P/VC:N/VI:L/VA:N/SC:L/SI:L/SA:N",
      "type": "CVSS_V4"
    }
  ],
  "summary": "Parse Server: Stored XSS via trailing-dot filename bypassing file upload extension blocklist"
}