Critical severity · published Mar 11, 2026
CVE-2026-31856
Parse Server has a SQL injection via `Increment` operation on nested object field in PostgreSQL
9.8
CVSS
0.4%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.4% · higher than 37% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
PA
parse-server · parse-community
>= 9.0.0 < 9.6.0-alpha.3; < 8.6.29 · source: vendor, NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-31856
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-31856
Product
https://github.com/parse-community/parse-server/releases/tag/8.6.29
Product
https://github.com/parse-community/parse-server/releases/tag/9.6.0-alpha.3
Patch
https://github.com/parse-community/parse-server/security/advisories/GHSA-q3vj-96h2-gwvg
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