CVE-2026-31856 Parse Server has a SQL injection via `Increment` operation on nested object field in PostgreSQL
Attackers can inject SQL via Increment operations on nested fields in PostgreSQL deployments to read arbitrary data and bypass access controls.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-31856?
CVE-2026-31856 is a critical SQL injection vulnerability in Parseplatform Parse-Server, published on 11 Mar 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Parse Server is an open source backend that can be deployed to any infrastructure that can run Node.js. A SQL injection vulnerability exists in the PostgreSQL storage adapter when processing Increment operations on nested object fields using dot notation (e.g., stats.counter). The amount value is interpolated directly into the SQL query without parameterization or type validation. An attacker who can send write requests to the Parse Server REST API can inject arbitrary SQL subqueries to read any data from the database, bypassing CLPs and ACLs. MongoDB deployments are not affected. This vulnerability is fixed in 9.6.0-alpha.3 and 8.6.29.
Weakness: CWE-89
Which versions are affected by CVE-2026-31856?
5 open source packages ship an affected version, including parse-server and parse. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
parse-server npm | All versions | 8.6.29 |
parse-server npm | All versions | 8.6.29 |
parse-server npm | From 9.0.0-alpha.1 | 9.6.0-alpha.3 |
parse-server npm | From 9.0.0-alpha.1 | 9.6.0-alpha.3 |
parse Bitnami | All versions | 8.6.29, 9.6.0 |
Products include Parseplatform Parse-Server.
How do I fix CVE-2026-31856?
Upgrade parse-server to a fixed version for your release line: 8.6.29 or 9.6.0-alpha.3.
Use parameterised queries everywhere and never build SQL by joining strings. Upgrade affected software first; a web application firewall only buys time. More about SQL injection.
Is CVE-2026-31856 being exploited?
There is no known exploitation of CVE-2026-31856 in the wild and no public exploit code.
Other vulnerabilities in Parseplatform Parse-Server
- CVE-2026-30966 Parse Server role escalation and CLP bypass via direct `_Join` table write
- CVE-2024-27298 Parse Server literalizeRegexPart SQL Injection
- CVE-2022-24760 Command Injection in Parse server
- CVE-2026-30965 Parse Server session token exfiltration via `redirectClassNameForKey` query parameter
- CVE-2023-36475 Parse Server vulnerable to remote code execution via MongoDB BSON parser through prototype pollution
Sources
Also known as BIT-parse-2026-31856, GHSA-q3vj-96h2-gwvg.