{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "extracted_events": [
              {
                "range": [
                  {
                    "introduced": "0"
                  },
                  {
                    "fixed": "4.33.0"
                  }
                ],
                "source": "AFFECTED_FIELD",
                "strategy": "StringRangeExpression"
              },
              {
                "range": [
                  {
                    "fixed": "9500b8b0e1d630d5e07fbb5fd2c25ed0943845ce"
                  }
                ],
                "source": "REFERENCES_COMMIT"
              },
              {
                "range": [
                  {
                    "fixed": "f84fd41cbf6c22eb8d0008fc9c25df1f7130b350"
                  }
                ],
                "source": "REFERENCES_COMMIT"
              },
              {
                "original_tag": "apostrophe@4.33.0",
                "range": [
                  {
                    "fixed": "9500b8b0e1d630d5e07fbb5fd2c25ed0943845ce"
                  }
                ],
                "source": "REFERENCES_TAG"
              }
            ]
          },
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "9500b8b0e1d630d5e07fbb5fd2c25ed0943845ce"
            },
            {
              "fixed": "f84fd41cbf6c22eb8d0008fc9c25df1f7130b350"
            }
          ],
          "repo": "https://github.com/apostrophecms/apostrophe",
          "type": "GIT"
        }
      ]
    }
  ],
  "aliases": [
    "GHSA-m2m5-rw3w-cwmj"
  ],
  "database_specific": {
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
      "CWE-1321",
      "CWE-79"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/113xxx/CVE-2026-113659.json"
  },
  "details": "ApostropheCMS is an open-source Node.js content management system. Prior to 4.33.0, an unauthenticated attacker can send a crafted link whose query string is automatically parsed by apos.http.parseQuery when an authenticated victim loads a page with the admin bundle. The parser accepts the special __proto__, constructor, and prototype path keys, allowing browser prototype mutation that can reach an unsafe DOM sink and execute script in the victim's session; anonymous visitors do not load the affected admin context. This issue is fixed in version 4.33.0.",
  "id": "CVE-2026-113659",
  "modified": "2026-10-21T02:30:47.482336530Z",
  "published": "2026-10-20T17:00:59.007Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/113xxx/CVE-2026-113659.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/apostrophe@4.33.0"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/apostrophecms/apostrophe/security/advisories/GHSA-m2m5-rw3w-cwmj"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-113659"
    }
  ],
  "schema_version": "1.9.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N",
      "type": "CVSS_V3"
    }
  ],
  "summary": "ApostropheCMS: Client-side Prototype Pollution in apos.http.parseQuery leading to DOM-based XSS against authenticated users"
}