{"id":"CVE-2026-116801","title":"Parse Server 9.0.0 before 9.10.5-alpha.6 ACL Bypass via $relatedTo Query","summary":"Parse Server before 8.6.105 and 9.0.0 before 9.10.5-alpha.6 does not validate the owning object reference in $relatedTo relation queries, so supplying a query operator instead of an object ID bypasses the owning-object ACL check. A clien…","severity":"medium","cvss":4.3,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N","cvssSource":"cna","cwe":["CWE-943"],"vendor":"parse-community","product":"parse-server","affected":["parse-server >= 9.0.0 < 9.10.5-alpha.6","parse-server < 8.6.105"],"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"partial","timestamp":"2026-10-27T13:42:07.586416Z"},"published":"2026-10-26","updated":"2026-10-27","sourceUpdated":"2026-10-27T14:16:07.428Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-116801","references":[{"url":"https://github.com/parse-community/parse-server/security/advisories/GHSA-58m4-cqvw-4vgh","label":"GitHub Security Advisory (GHSA-58m4-cqvw-4vgh)"},{"url":"https://www.vulncheck.com/advisories/parse-server-9.0.0-before-9.10.5-alpha.6-acl-bypass-via-relatedto-query","label":"VulnCheck Advisory: Parse Server 9.0.0 before 9.10.5-alpha.6 ACL Bypass via $relatedTo Query"}],"tags":["cve.org"],"epss":0.00253,"epssPercentile":0.16671,"ingestedAt":"2026-10-27T16:11:59.450Z","slug":"CVE-2026-116801","body":"## Overview\n\nParse Server before 8.6.105 and 9.0.0 before 9.10.5-alpha.6 does not validate the owning object reference in $relatedTo relation queries, so supplying a query operator instead of an object ID bypasses the owning-object ACL check. A client with read access to at least one object of the owning class can disclose which readable objects are linked to owning objects it cannot read.\n\n## Affected\n\n- `parse-server >= 9.0.0 < 9.10.5-alpha.6`\n- `parse-server < 8.6.105`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":24,"depthScoreParts":{"impact":23.7,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}