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TI-2026-38746 Aliases CVE-2026-53726GHSA-wmwx-jr2p-4j4r

Parse Server: Relation `$relatedTo` query bypasses `protectedFields` and owning-object ACL

Priority LOW 36CWE-639Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Attack requirements
None
Impact type
Security bypass
Confidentiality · integrity · availability
Low · None · None
Fix status
Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA and GitHub. Impact type from CWE-639.

Summary

Parse Server is an open source backend that can be deployed to any infrastructure that can run Node.js. Prior to versions 8.6.80 and 9.9.1-alpha.6, a relation query using the $relatedTo operator could read the membership of a Relation field even when that field was hidden from the requesting client by protectedFields, and even when the object owning the relation was not readable by the client under its ACL or class-level permissions. The request requires only the public API credentials that Parse clients normally carry — no user session, master key, or Cloud Code is needed. As a result, an unauthenticated client who knows or obtains the owning object's objectId could enumerate the objects linked through a protected relation, or combine the operator with an objectId constraint to use it as a membership oracle — confirming whether a specific object is linked to a private parent. This affects applications that rely on protectedFields or object ACLs to keep Relation membership confidential, such as private group memberships, block lists, or account-to-resource associations. This issue has been patched in versions 8.6.80 and 9.9.1-alpha.6.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00276 20th percentileScored 2026-11-07
Fix Fixed parse-server (parse-community): 8.6.80, 9.9.1-alpha.6parse-server (npm): 9.9.1-alpha.6, 8.6.80

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
Yes
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
parse-communityparse-serverbefore 8.6.80; 9.0.0 to before 9.9.1-alpha.68.6.80, 9.9.1-alpha.6Patch availableCNA
—parse-server (npm)9.0.0 to before 9.9.1-alpha.69.9.1-alpha.6Patch availableGHSA-wmwx-jr2p-4j4r
—parse-server (npm)before 8.6.808.6.80Patch availableGHSA-wmwx-jr2p-4j4r
  • parse-server Vendorparse-community Affected before 8.6.80; 9.0.0 to before 9.9.1-alpha.6 Fixed in 8.6.80, 9.9.1-alpha.6 Patch available CNA
  • parse-server (npm) Vendor— Affected 9.0.0 to before 9.9.1-alpha.6 Fixed in 9.9.1-alpha.6 Patch available GHSA-wmwx-jr2p-4j4r
  • parse-server (npm) Vendor— Affected before 8.6.80 Fixed in 8.6.80 Patch available GHSA-wmwx-jr2p-4j4r

CPE names Threatist (inferred) · 1

Inferred from how NVD named this product before; not given by a source.

CPEVersionsRoleVendor
cpe:2.3:a:parseplatform:parse-server:*:*:*:*:*:*:*:*——parse-community
  • cpe:2.3:a:parseplatform:parse-server:*:*:*:*:*:*:*:* Versions — — ·parse-community

Remediation

  • Fix · CNA parse-server (parse-community) Fixed in 8.6.80, 9.9.1-alpha.6
  • Fix · GHSA-wmwx-jr2p-4j4r parse-server (npm) Fixed in 9.9.1-alpha.6 Advisory →
  • Fix · GHSA-wmwx-jr2p-4j4r parse-server (npm) Fixed in 8.6.80 Advisory →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-53726
  2. 2026-10-03 Alias added: GHSA-wmwx-jr2p-4j4r

References

Advisory 1

Other 4

  • TI-2022-08574 Command Injection in Parse server CVSS 3.1CRITICAL 10.0
  • TI-2024-18136 Parse Server literalizeRegexPart SQL Injection CVSS 3.1CRITICAL 10.0
  • TI-2022-18768 Parse Server vulnerable to Remote Code Execution via prototype pollution in MongoDB BSON parser CVSS 3.1CRITICAL 9.8
  • TI-2024-31550 Parse Server's custom object ID allows to acquire role privileges CVSS 3.1HIGH 8.1
  • TI-2025-35510 parse is a package designed to parse JavaScript SDK. CVSS 3.1MEDIUM 6.5
  • TI-2024-26265 ZDI-CAN-23894: Parse Server literalizeRegexPart SQL Injection Authentication Bypass Vulnerability CVSS 3.1CRITICAL 9.8
See all 158 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences