CVE-2026-31840

Description

Parse Server is an open source backend that can be deployed to any infrastructure that can run Node.js. Prior to 9.6.0 and 8.6.28, an attacker can use a dot-notation field name in combination with the sort query parameter to inject SQL into the PostgreSQL database through an improper escaping of sub-field values in dot-notation queries. The vulnerability may also affect queries that use dot-notation field names with the distinct and where query parameters. This vulnerability only affects deployments using a PostgreSQL database. This vulnerability is fixed in 9.6.0 and 8.6.28.

How to fix CVE-2026-31840

To remediate CVE-2026-31840, upgrade the affected package to a fixed version below.

• —upgrade to 8.6.28 or later
• —upgrade to 9.6.0-alpha.2 or later

Is CVE-2026-31840 being exploited?

Low — EPSS is 0.4%, meaning exploitation activity has not been observed at scale.

Affected packages (2)

• from 0, < 8.6.28, >= 9.0.0, < 9.6.0
• >= 9.0.0, < 9.6.0-alpha.2

CVSS scores

References (5)

• ADVISORYnvd.nist.gov/vuln/detail/CVE-2026-31840
• PATCHgithub.com/parse-community/parse-server
• WEBgithub.com/parse-community/parse-server/releases/tag/8.6.28
• WEBgithub.com/parse-community/parse-server/releases/tag/9.6.0-alpha.2