---
id: CVE-2026-121965
title: >-
  Parse Server before 8.6.113 and 9.10.6-alpha.5 Prototype Pollution via Dot
  Notation Key
summary: >-
  Parse Server before 8.6.113 and 9.0.0 before 9.10.6-alpha.5 contains a
  prototype pollution vulnerability when building objects for Cloud Code
  triggers and LiveQuery, where a dot notation key whose intermediate segment
  resolves through an…
severity: medium
cvss: 5.3
cvssVector: 'CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H'
cvssSource: cna
cwe:
  - CWE-1321
vendor: parse-community
product: parse-server
affected:
  - parse-server >= 9.0.0 < 9.10.6-alpha.5
  - parse-server < 8.6.113
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-11-04T18:18:12.252207Z'
published: '2026-11-04'
updated: '2026-11-04'
sourceUpdated: '2026-11-04T18:18:47.790Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-121965'
references:
  - url: >-
      https://github.com/parse-community/parse-server/security/advisories/GHSA-95hp-82c6-25q5
    label: GitHub Security Advisory (GHSA-95hp-82c6-25q5)
  - url: 'https://github.com/parse-community/parse-server/pull/10810'
    label: 'GitHub Pull Request #10810'
  - url: 'https://github.com/parse-community/parse-server/pull/10811'
    label: 'GitHub Pull Request #10811'
  - url: >-
      https://www.vulncheck.com/advisories/parse-server-before-8.6.113-and-9.10.6-alpha.5-prototype-pollution-via-dot-notation-key
    label: >-
      VulnCheck Advisory: Parse Server before 8.6.113 and 9.10.6-alpha.5
      Prototype Pollution via Dot Notation Key
tags:
  - cve.org
ingestedAt: '2026-11-05T21:36:00.483Z'
epss: 0.00413
epssPercentile: 0.35857
---

## Overview

Parse Server before 8.6.113 and 9.0.0 before 9.10.6-alpha.5 contains a prototype pollution vulnerability when building objects for Cloud Code triggers and LiveQuery, where a dot notation key whose intermediate segment resolves through an inherited member writes onto a process-wide built-in. Clients with write access to an object in a class with a trigger or LiveQuery can corrupt a built-in function, making unrelated requests fail until restart and denying service to all clients and hosted applications.

## Affected

- `parse-server >= 9.0.0 < 9.10.6-alpha.5`
- `parse-server < 8.6.113`

## Remediation

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