---
id: CVE-2026-34532
title: >-
  Parse Server is an open source backend that can be deployed to any
  infrastructure that can run Node.js
summary: >-
  Parse Server is an open source backend that can be deployed to any
  infrastructure that can run Node.js. Prior to versions 8.6.67 and
  9.7.0-alpha.11, an attacker can bypass Cloud Function validator access
  controls by appending "prototype.…
severity: critical
cvss: 9.1
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N'
cwe:
  - CWE-863
vendor: parseplatform
product: parse-server
affected:
  - parse-server < 8.6.67
  - 'parse-server >= 9.0.0, < 9.7.0'
  - parse-server = 9.7.0
patched:
  - parse-server 9.7.0
published: '2026-03-31'
updated: '2026-07-24'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-34532'
references:
  - url: >-
      https://github.com/parse-community/parse-server/commit/4fc48cf28f22eea200d74d883505f485234a48d7
    label: security-advisories@github.com
  - url: >-
      https://github.com/parse-community/parse-server/commit/dc59e272665644083c5b7f6862d88ce1ef0b2674
    label: security-advisories@github.com
  - url: 'https://github.com/parse-community/parse-server/pull/10342'
    label: security-advisories@github.com
  - url: 'https://github.com/parse-community/parse-server/pull/10343'
    label: security-advisories@github.com
  - url: >-
      https://github.com/parse-community/parse-server/security/advisories/GHSA-vpj2-qq7w-5qq6
    label: security-advisories@github.com
tags:
  - nvd
epss: 0.00486
epssPercentile: 0.39183
ingestedAt: '2026-07-24T20:38:02.111Z'
---

## Overview

Parse Server is an open source backend that can be deployed to any infrastructure that can run Node.js. Prior to versions 8.6.67 and 9.7.0-alpha.11, an attacker can bypass Cloud Function validator access controls by appending "prototype.constructor" to the function name in the URL. When a Cloud Function handler is declared using the function keyword and its validator is a plain object or arrow function, the trigger store traversal resolves the handler through its own prototype chain while the validator store fails to mirror this traversal, causing all access control enforcement to be skipped. This allows unauthenticated callers to invoke Cloud Functions that are meant to be protected by validators such as requireUser, requireMaster, or custom validation logic. This issue has been patched in versions 8.6.67 and 9.7.0-alpha.11.

## Affected

- `parse-server < 8.6.67`
- `parse-server >= 9.0.0, < 9.7.0`
- `parse-server = 9.7.0`

## Remediation

Upgrade past the affected range:

- `parse-server 9.7.0`