by Kastro
Paper/Archive/CVE-2026-31856

CVE-2026-31856

parse-community parse-server — Parse Server has a SQL injection via `Increment` operation on nested object field in 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 38.1.381 × 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. 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.

Affected

ProductAffectedFixed inSource
parse-server>= 9.0.0 < 9.6.0-alpha.3–CNA
parse-server< 8.6.29–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:N/SC:N/SI:N/SA:N
CISA ADPSSVCExploitation: none · Automatable: yes · Technical impact: total

References

refgithub.com/parse-community/parse-server/security/advisories/GHSA-q3vj-96h2-gwvgrefgithub.com/parse-community/parse-server/releases/tag/8.6.29refgithub.com/parse-community/parse-server/releases/tag/9.6.0-alpha.3