CVE-2026-31871
EPSS 0.04%Parse Server vulnerable to SQL Injection via dot-notation sub-key name in `Increment` operation on PostgreSQL
Description
### Impact 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 sub-key name is interpolated directly into SQL string literals without escaping. An attacker who can send write requests to the Parse Server REST API can inject arbitrary SQL via a crafted sub-key name containing single quotes, potentially executing commands or reading data from the database, bypassing CLPs and ACLs. Only Postgres deployments are affected. ### Patches The fix escapes single quotes in the sub-key name before interpolating it into the SQL query, preventing breakout from SQL string literals. ### Workarounds There is no known workaround. ### References - GitHub security advisory: https://github.com/parse-community/parse-server/security/advisories/GHSA-gqpp-xgvh-9h7h - Fix Parse Server 9: https://github.com/parse-community/parse-server/releases/tag/9.6.0-alpha.5 - Fix Parse Server 8: https://github.com/parse-community/parse-server/releases/tag/8.6.31
Affected packages (2)
- Bitnami/parsefrom 0, < 8.6.31, >= 9.0.0, < 9.6.0
- npm/parse-server>= 9.0.0-alpha.1, < 9.6.0-alpha.5
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 4.0 | — | 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 |
References (5)
- ADVISORYhttps://nvd.nist.gov/vuln/detail/CVE-2026-31871
- PATCHhttps://github.com/parse-community/parse-server
- WEBhttps://github.com/parse-community/parse-server/releases/tag/8.6.31
- WEBhttps://github.com/parse-community/parse-server/releases/tag/9.6.0-alpha.5
- WEBhttps://github.com/parse-community/parse-server/security/advisories/GHSA-gqpp-xgvh-9h7h