{"schema":"threatline.record/2","record":{"id":"CVE-2026-109303","aliases":["GHSA-rmhf-xv62-rm99"],"summary":"Parse Server before 8.6.93 and 9.0.0 before 9.10.1-alpha.13 protectedFields Bypass via Relation Count Query","details":"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.","categories":["Unclassified"],"product":"parse-server","vendor":"parse-community","ecosystem":null,"affected_ranges":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-109303","source_modified_at":"2026-10-13T16:00:25.994Z","fetched_at":"2026-10-23T18:48:36.087640Z","product":"parse-server","vendor":"parse-community","versions":[{"version":"9.0.0","status":"affected","versionType":"semver","lessThan":"9.10.1-alpha.13"},{"version":"9.10.1-alpha.13","status":"unaffected","versionType":"semver"}],"defaultStatus":"unaffected"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-109303","source_modified_at":"2026-10-13T16:00:25.994Z","fetched_at":"2026-10-23T18:48:36.087640Z","product":"parse-server","vendor":"parse-community","versions":[{"version":"0","status":"affected","versionType":"semver","lessThan":"8.6.93"},{"version":"8.6.93","status":"unaffected","versionType":"semver"}],"defaultStatus":"unaffected"}],"fixed_versions":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-109303","source_modified_at":"2026-10-13T16:00:25.994Z","fetched_at":"2026-10-23T18:48:36.087640Z","package":{"name":"parse-server","ecosystem":null},"version":"9.10.1-alpha.13","basis":"first unaffected version stated in the CVE record"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-109303","source_modified_at":"2026-10-13T16:00:25.994Z","fetched_at":"2026-10-23T18:48:36.087640Z","package":{"name":"parse-server","ecosystem":null},"version":"8.6.93","basis":"first unaffected version stated in the CVE record"}],"cvss":5.3,"severity":"Medium","kev":{"listed":false},"epss":{"probability":0.00204,"percentile":0.0991,"score_date":"2026-10-23"},"published_at":"2026-10-12T16:05:00.257Z","modified_at":"2026-10-13T16:00:25.994Z","provenance":[{"source":"CVE List","url":"https://www.cve.org/CVERecord?id=CVE-2026-109303","fetched_at":"2026-10-23T18:48:36.087640Z","source_modified_at":"2026-10-13T16:00:25.994Z"},{"source":"EPSS","url":"https://api.first.org/data/v1/epss?cve=CVE-2026-109303","fetched_at":"2026-10-23T18:42:43.628194Z","source_modified_at":"2026-10-23"}],"sources":["CVE List","EPSS"],"references":[{"source":"CVE List","url":"https://github.com/parse-community/parse-server/security/advisories/GHSA-rmhf-xv62-rm99","tags":["vendor-advisory"]},{"source":"CVE List","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","tags":["third-party-advisory"]}],"locations":[],"motoko_assessment":{"status":"requires_architecture_review","automatic_remediation":false},"cve_state":"PUBLISHED","cvss_source":"CVE List","ssvc":{"exploitation":"none","automatable":"no","technical_impact":"partial","assessed_at":"2026-10-13T15:59:53.723277Z"},"classification":{"method":"product-first software-layer rules","rules_version":"2.1","matched_on":null,"confidence":"unknown","reviewed":false},"change_timestamp":"2026-10-13T16:00:25.994Z","content_hash":"5728736d8f3dc226d0f9385a864b28e798fb9c65ea07a995bf7e02d3286f8c2a"}}