---
id: CVE-2026-34373
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 8.6.66 and
  9.7.0-alpha.10, the GraphQL API endpoint does not respect the allowOrigin
  server option and unconditiona…
severity: high
cvss: 8.8
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H'
cwe:
  - CWE-346
vendor: parseplatform
product: parse-server
affected:
  - 'parse-server >= 3.5.0, < 8.6.66'
  - '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-2026-34373'
references:
  - url: >-
      https://github.com/parse-community/parse-server/commit/0347641507891d0013ec57f7c10f012064f41263
    label: security-advisories@github.com
  - url: >-
      https://github.com/parse-community/parse-server/commit/4dd0d3d8be1c39664c74ad10bb0abaa76bc41203
    label: security-advisories@github.com
  - url: 'https://github.com/parse-community/parse-server/pull/10334'
    label: security-advisories@github.com
  - url: 'https://github.com/parse-community/parse-server/pull/10335'
    label: security-advisories@github.com
  - url: >-
      https://github.com/parse-community/parse-server/security/advisories/GHSA-q3p6-g7c4-829c
    label: security-advisories@github.com
tags:
  - nvd
epss: 0.00244
epssPercentile: 0.13897
ingestedAt: '2026-07-24T21:39:13.526Z'
---

## Overview

Parse Server is an open source backend that can be deployed to any infrastructure that can run Node.js. Prior to versions 8.6.66 and 9.7.0-alpha.10, the GraphQL API endpoint does not respect the allowOrigin server option and unconditionally allows cross-origin requests from any website. This bypasses origin restrictions that operators configure to control which websites can interact with the Parse Server API. The REST API correctly enforces the configured allowOrigin restriction. This issue has been patched in versions 8.6.66 and 9.7.0-alpha.10.

## Affected

- `parse-server >= 3.5.0, < 8.6.66`
- `parse-server >= 9.0.0, < 9.7.0`
- `parse-server = 9.7.0`

## Remediation

Upgrade past the affected range:

- `parse-server 9.7.0`