CVE-2026-31800

Description

Parse Server is an open source backend that can be deployed to any infrastructure that can run Node.js. Prior to 9.5.2 and 8.6.25, the _GraphQLConfig and _Audience internal classes can be read, modified, and deleted via the generic /classes/_GraphQLConfig and /classes/_Audience REST API routes without master key authentication. This bypasses the master key enforcement that exists on the dedicated /graphql-config and /push_audiences endpoints. An attacker can read, modify and delete GraphQL configuration and push audience data. This vulnerability is fixed in 9.5.2 and 8.6.25.

How to fix CVE-2026-31800

To remediate CVE-2026-31800, upgrade the affected package to a fixed version below.

• —upgrade to 8.6.25 or later
• —upgrade to 9.5.2-alpha.12 or later

Is CVE-2026-31800 being exploited?

Low — EPSS is 0.3%, meaning exploitation activity has not been observed at scale.

Affected packages (2)

• from 0, < 8.6.25, >= 9.0.0, < 9.5.2
• >= 9.0.0-alpha.1, < 9.5.2-alpha.12

CVSS scores

References (5)

• ADVISORYnvd.nist.gov/vuln/detail/CVE-2026-31800
• PATCHgithub.com/parse-community/parse-server
• WEBgithub.com/parse-community/parse-server/releases/tag/8.6.25
• WEBgithub.com/parse-community/parse-server/releases/tag/9.5.2-alpha.12