---
id: CVE-2026-116161
title: >-
  Parse Server 9.0.0 before 9.10.5-alpha.4 LiveQuery Information Disclosure via
  $or Subscriptions
summary: >-
  Parse Server before 8.6.103 and 9.0.0 before 9.10.5-alpha.4 contains an
  information disclosure vulnerability in LiveQuery. Its subscription hash omits
  constraints next to a $or operator, including the _Session owner filter and
  beforeSubs…
severity: medium
cvss: 6
cvssVector: 'CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N'
cvssSource: cna
cwe:
  - CWE-200
vendor: parse-community
product: parse-server
affected:
  - parse-server >= 9.0.0 < 9.10.5-alpha.4
  - parse-server < 8.6.103
published: '2026-10-25'
updated: '2026-10-25'
sourceUpdated: '2026-10-25T13:20:06.298Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-116161'
references:
  - url: >-
      https://github.com/parse-community/parse-server/security/advisories/GHSA-349r-988w-x3jp
    label: GitHub Security Advisory (GHSA-349r-988w-x3jp)
  - url: >-
      https://www.vulncheck.com/advisories/parse-server-9.0.0-before-9.10.5-alpha.4-livequery-information-disclosure-via-or-subscriptions
    label: >-
      VulnCheck Advisory: Parse Server 9.0.0 before 9.10.5-alpha.4 LiveQuery
      Information Disclosure via $or Subscriptions
tags:
  - cve.org
ingestedAt: '2026-10-25T22:08:29.949Z'
---

## Overview

Parse Server before 8.6.103 and 9.0.0 before 9.10.5-alpha.4 contains an information disclosure vulnerability in LiveQuery. Its subscription hash omits constraints next to a $or operator, including the _Session owner filter and beforeSubscribe constraints, so distinct subscriptions are grouped together. Authenticated clients subscribing with $or queries can receive other users' events, including session tokens usable for impersonation.

## Affected

- `parse-server >= 9.0.0 < 9.10.5-alpha.4`
- `parse-server < 8.6.103`

## Remediation

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