{"id":"CVE-2026-109303","revision":"a43f3cf60e8343f19a83733042527d09","records":[{"revision":"a43f3cf60e8343f19a83733042527d09","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-109303","aliases":[],"title":"Parse Server before 8.6.93 and 9.0.0 before 9.10.1-alpha.13 protectedFields Bypass via Relation Count Query","description":"Parse Server before 8.6.93 and 9.0.0 before 9.10.1-alpha.13 does not enforce identity-scoped protectedFields (authenticated, role, or per-user groups) on count queries using the $relatedTo operator, exposing the size of protected Relation fields. An authenticated user who can read the owning object can combine counts with an objectId constraint as a membership oracle to reveal confidential memberships such as private groups or block lists.","state":0,"publishedAt":"2026-10-12T16:05:00.257+00:00","modifiedAt":"2026-10-13T16:00:25.994+00:00","affected":[{"ecosystem":"Vendor product","name":"parse-server","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"parse-community\",\n                    \"product\": \"parse-server\",\n                    \"defaultStatus\": \"unaffected\",\n                    \"packageURL\": \"pkg:npm/parse-server\",\n                    \"versions\": [\n                        {\n                            \"version\": \"9.0.0\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"semver\",\n                            \"lessThan\": \"9.10.1-alpha.13\"\n                        },\n                        {\n                            \"version\": \"9.10.1-alpha.13\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        }\n                    ]\n                }"},{"ecosystem":"Vendor product","name":"parse-server","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"parse-community\",\n                    \"product\": \"parse-server\",\n                    \"defaultStatus\": \"unaffected\",\n                    \"packageURL\": \"pkg:npm/parse-server\",\n                    \"versions\": [\n                        {\n                            \"version\": \"0\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"semver\",\n                            \"lessThan\": \"8.6.93\"\n                        },\n                        {\n                            \"version\": \"8.6.93\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 4.0","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N","score":5.3,"severity":"MEDIUM"},{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N","score":4.3,"severity":"MEDIUM"}],"references":["https://github.com/parse-community/parse-server/security/advisories/GHSA-rmhf-xv62-rm99","https://www.vulncheck.com/advisories/parse-server-before-8.6.93-and-9.0.0-before-9.10.1-alpha.13-protectedfields-bypass-via-relation-count-query"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-109303","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-109303","identifiers":["CVE-2026-109303"]},"retained":false,"historicalAffected":[]}],"coverage":[]}