CVE-2026-116801

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

At a glance

Severity: MEDIUM 5.3
EPSS: EPSS 0.25 % · percentile 17 (2026-10-27)
State: PUBLISHED
Published: 2026-10-26
Updated: 2026-10-27
Assigner: VulnCheck
NVD status: Awaiting Analysis

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.

Scores

Version	Score	Vector	Scored by
CVSS 4.0	MEDIUM 5.3	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	VulnCheck
CVSS 3.1	MEDIUM 4.3	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N	VulnCheck
CVSS 4.0	MEDIUM 5.3	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	NVD · disclosure@vulncheck.com (Secondary)
CVSS 3.1	MEDIUM 4.3	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N	NVD · disclosure@vulncheck.com (Secondary)

Weaknesses (CWE)

CWE-943

European references

ENISA EUVD · EUVD-2026-110509
GCVE · GCVE-0-2026-116801

Affected products

Product	Versions
parse-community · parse-server	affected 9.0.0 < 9.10.5-alpha.6 ; unaffected 9.10.5-alpha.6
parse-community · parse-server	affected 0 < 8.6.105 ; unaffected 8.6.105

References

Sources

Source	Licence
CVE List (CVEProject cvelistV5)	CVE Program Terms of Use
EPSS (FIRST.org)	FIRST — attribution requested
ENISA EUVD	ENISA — reproduction authorised, source acknowledged
NVD (NIST) via fkie-cad/nvd-json-data-feeds	Public domain — this product uses data from the NVD API but is not endorsed or certified by the NVD