{"id":"CVE-2026-53609","revision":"cf1d841d7d9b4a368a1e1363193639ed","records":[{"revision":"cf1d841d7d9b4a368a1e1363193639ed","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-53609","aliases":[],"title":"Apostrophe has Server-Side Prototype Pollution in apos.util.set via patch operators that leads to process-wide authorization bypass","description":"ApostropheCMS is an open-source Node.js content management system. In versions up to and including 4.30.0, `apos.util.set()` traverses dot-notation paths without sanitizing `__proto__`, allowing an authenticated editor to write arbitrary values to `Object.prototype` via the `$pullAll` patch operator. A confirmed gadget in `publicApiCheck()` causes this to bypass authorization on all piece-type REST API endpoints for every subsequent unauthenticated request, for the lifetime of the Node.js process. As of time of publication, no known patched versions are available.","state":0,"publishedAt":"2026-06-12T20:59:25.486+00:00","modifiedAt":"2026-06-15T18:29:55.055+00:00","affected":[{"ecosystem":"Vendor product","name":"apostrophe","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"apostrophecms\",\n                    \"product\": \"apostrophe\",\n                    \"versions\": [\n                        {\n                            \"version\": \"<= 4.30.0\",\n                            \"status\": \"affected\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:L/A:L","score":9.1,"severity":"CRITICAL"}],"references":["https://github.com/apostrophecms/apostrophe/security/advisories/GHSA-6h5j-32cf-4253"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-53609","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-53609","identifiers":["CVE-2026-53609"]},"retained":false,"historicalAffected":[]}],"coverage":[]}