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OpenAdvisories
Medium · 4.3 CVE-2026-116801 EUVD-2026-110509GHSA-mfg3-66fp-4xc4

Parse Server 9.0.0 before 9.10.5-alpha.6 ACL Bypass via $relatedTo Query

Published Oct 26, 2026 · Updated Oct 27, 2026 · Assigned by VulnCheck

Description

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 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.

Affected products

VendorProductAffectedFixed
parse-community parse-server 9.0.0 – < 9.10.5-alpha.6, < 8.6.105 9.10.5-alpha.6

References