---
id: CVE-2026-116164
title: >-
  Parse Server 9.0.0 before 9.10.4-alpha.3 Reserved Field Name Injection via
  Object Writes
summary: >-
  Parse Server before 8.6.100 and 9.0.0 before 9.10.4-alpha.3 does not reject
  reserved internal field names in client object writes, allowing clients to
  store or clear internal fields. Attackers can write a reserved field that
  makes reads …
severity: medium
cvss: 6.3
cvssVector: 'CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N'
cvssSource: cna
cwe:
  - CWE-20
vendor: parse-community
product: parse-server
affected:
  - parse-server >= 9.0.0 < 9.10.4-alpha.3
  - parse-server < 8.6.100
published: '2026-10-25'
updated: '2026-10-25'
sourceUpdated: '2026-10-25T13:20:08.336Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-116164'
references:
  - url: >-
      https://github.com/parse-community/parse-server/security/advisories/GHSA-gwrq-q25v-g8mr
    label: GitHub Security Advisory (GHSA-gwrq-q25v-g8mr)
  - url: >-
      https://www.vulncheck.com/advisories/parse-server-9.0.0-before-9.10.4-alpha.3-reserved-field-name-injection-via-object-writes
    label: >-
      VulnCheck Advisory: Parse Server 9.0.0 before 9.10.4-alpha.3 Reserved
      Field Name Injection via Object Writes
tags:
  - cve.org
ingestedAt: '2026-10-25T22:08:29.948Z'
---

## Overview

Parse Server before 8.6.100 and 9.0.0 before 9.10.4-alpha.3 does not reject reserved internal field names in client object writes, allowing clients to store or clear internal fields. Attackers can write a reserved field that makes reads of an object fail on MongoDB, disrupting queries on that class for all users, or clear their own account lockout state and password history to bypass lockout and password policies.

## Affected

- `parse-server >= 9.0.0 < 9.10.4-alpha.3`
- `parse-server < 8.6.100`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.