---
title: "CVE-2026-31840: Parse Server: SQL injection via dot-notation field name in PostgreSQL"
url: https://erroneo.us/security/cve/CVE-2026-31840/
description: "CVE-2026-31840 (parse-server (npm)): Parse Server is an open source backend that can be deployed to any infrastructure that can run Node.js. Prior to…"
type: vulnerability-record
section: "Security Digest"
date_published: 2026-03-11
date_modified: 2026-03-11
publisher: erroneo.us
author: erroneo.us Security Desk
cve: "CVE-2026-31840"
kev: false
cvss: 9.3
epss: 0.00729
license: All rights reserved. Quote with attribution and a link.
---

# CVE-2026-31840: Parse Server: SQL injection via dot-notation field name in PostgreSQL

**Signal:** Critical and remotely reachable. No known exploitation yet, but it is network-reachable without credentials. (Computed from CISA KEV, EPSS and CVSS; not an editorial verdict.)

## Should you act?

- No confirmed exploitation. It is not in CISA’s KEV catalog and CISA’s SSVC assessment records no known exploitation. That can change quickly after a public write-up; re-check if you are affected.
- EPSS 0.7% , percentile 54: FIRST’s model estimates a 0.7% chance of exploitation activity in the next 30 days, higher than 54% of all scored CVEs (moderate). EPSS is a probability, not a verdict.
- Remotely reachable with no login and no user interaction. If the vulnerable service is exposed to the internet, prioritize it.
- Only applies if your dependency tree includes parse-server (npm) >= 9.0.0, < 9.6.0-alpha.2, fixed in 9.6.0-alpha.2 ; parse-server (npm) < 8.6.28, fixed in 8.6.28 . Check your lockfile, including transitive dependencies.

## What it is

Parse Server is an open source backend that can be deployed to any infrastructure that can run Node.js. Prior to 9.6.0-alpha.2 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-alpha.2 and 8.6.28.

## Affected packages

- npm `parse-server` >= 9.0.0, < 9.6.0-alpha.2 → fixed: 9.6.0-alpha.2
- npm `parse-server` < 8.6.28 → fixed: 8.6.28

## Affected products (CVE record)

- parse-community parse-server: >= 9.0.0 < 9.6.0-alpha.2, < 8.6.28

## Severity

- GitHub_M CVSS 4.0: 9.3 `CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N`
- GitHub CVSS 4.0: 9.3 `CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N`

## Exploitation

- CISA KEV: not listed (no confirmed in-the-wild exploitation known to CISA).
- CISA SSVC assessment: exploitation none , automatable yes , technical impact total .
- FIRST EPSS (model of 2026-10-21): 0.73% probability of exploitation activity in the next 30 days; percentile 54.

## Sources

- [GitHub Advisory GHSA-qpr4-jrj4-6f27](https://github.com/advisories/GHSA-qpr4-jrj4-6f27)
- [CVE.org record CVE-2026-31840](https://www.cve.org/CVERecord?id=CVE-2026-31840)
- [NVD entry CVE-2026-31840](https://nvd.nist.gov/vuln/detail/CVE-2026-31840)
- [github.com](https://github.com/parse-community/parse-server/security/advisories/GHSA-qpr4-jrj4-6f27)
- [github.com](https://github.com/parse-community/parse-server/releases/tag/8.6.28)
- [github.com](https://github.com/parse-community/parse-server/releases/tag/9.6.0-alpha.2)

---
Source page: https://erroneo.us/security/cve/CVE-2026-31840/ · Security Digest: https://erroneo.us/security/ · More: https://erroneo.us/llms.txt