{"id":"BIT-parse-2026-109303","summary":"Parse Server before 8.6.93 and 9.0.0 before 9.10.1 protectedFields Bypass via Relation Count Query","details":"Parse Server before 8.6.93 and 9.0.0 before 9.10.1 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.","aliases":["CVE-2026-109303","GHSA-rmhf-xv62-rm99"],"modified":"2026-10-19T15:10:40.564054594Z","published":"2026-10-19T14:26:34.738Z","database_specific":{"severity":"Medium","cpes":["cpe:2.3:a:parseplatform:parse-server:*:*:*:*:*:node.js:*:*"]},"references":[{"type":"WEB","url":"https://github.com/parse-community/parse-server/security/advisories/GHSA-rmhf-xv62-rm99"},{"type":"WEB","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-109303"},{"type":"WEB","url":"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"}],"affected":[{"package":{"name":"parse","ecosystem":"Bitnami","purl":"pkg:bitnami/parse"},"ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"8.6.93"},{"introduced":"9.0.0"},{"fixed":"9.10.1"}]}],"database_specific":{"source":"https://github.com/bitnami/vulndb/tree/main/data/parse/BIT-parse-2026-109303.json"},"severity":[{"type":"CVSS_V4","score":"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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X"}]}],"schema_version":"1.9.0"}