{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "source": "REFERENCES"
          },
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "5a3746aaed49761e171c2cbfe793267c959829fd"
            }
          ],
          "repo": "https://github.com/apostrophecms/apostrophe",
          "type": "GIT"
        }
      ]
    }
  ],
  "aliases": [
    "GHSA-vmg4-6gfg-83qx"
  ],
  "database_specific": {
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
      "CWE-1321"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/71xxx/CVE-2026-71553.json",
    "unresolved_ranges": [
      {
        "extracted_events": [
          {
            "last_affected": "4.32.0"
          }
        ],
        "source": "AFFECTED_FIELD"
      }
    ]
  },
  "details": "ApostropheCMS is an open-source Node.js content management system. In 4.32.0 and earlier, PATCH /api/v1/article/:id accepts the inherited path toString.call and passes it through the utility module to apos.util.set() and apos.util.get(), allowing an authenticated editor to overwrite the shared Object.prototype.toString function's call property and cause a persistent process-wide denial of service until restart.",
  "id": "CVE-2026-71553",
  "modified": "2026-08-19T03:31:22.435045466Z",
  "published": "2026-08-17T20:03:37.883Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/71xxx/CVE-2026-71553.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/apostrophecms/apostrophe/security/advisories/GHSA-vmg4-6gfg-83qx"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-71553"
    },
    {
      "type": "FIX",
      "url": "https://github.com/apostrophecms/apostrophe/commit/5a3746aaed49761e171c2cbfe793267c959829fd"
    }
  ],
  "schema_version": "1.9.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:H/SC:N/SI:N/SA:N",
      "type": "CVSS_V4"
    }
  ],
  "summary": "ApostropheCMS: 2nd-order prototype pollution via PATCH leading to single-request persistent DoS"
}