by Kastro
Paper/Archive/CVE-2026-31871

CVE-2026-31871

parse-community parse-server — Parse Server has a SQL Injection via dot-notation sub-key name in `Increment` operation on PostgreSQL

EPSS 0.4%CVSS 9.8
critical.is priorityof 100
37
CVSS 9.8 (NVD)9.8 / 10 × 3029.4Not in CISA KEV+300.0EPSS percentile 37.8.378 × 207.6No public exploit+100.0SSVC exploitation: none+100.0
Description · from the CVE record

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.5 and 8.6.31, 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. This vulnerability is fixed in 9.6.0-alpha.5 and 8.6.31.

Affected

ProductAffectedFixed inSource
parse-server>= 9.0.0 < 9.6.0-alpha.5–CNA
parse-server< 8.6.31–CNA

Scores by source

NVD9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
GitHub_M (CNA)9.3CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
CISA ADPSSVCExploitation: none · Automatable: yes · Technical impact: total

References

refgithub.com/parse-community/parse-server/security/advisories/GHSA-gqpp-xgvh-9h7hrefgithub.com/parse-community/parse-server/releases/tag/8.6.31refgithub.com/parse-community/parse-server/releases/tag/9.6.0-alpha.5