Vulnerability · Published Mar 10, 2026 · Assigned by GitHub_M

CVE-2026-30946Parse Server affected by denial-of-service via unbounded query complexity in REST and GraphQL API

High 8.7

In plain English

A high-severity resource allocation without limits in parse-server from parse-community. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.6% (higher than 50% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 4.0)8.7High

Exploit odds (30 days)0.6%top 50.1% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official description

Parse Server is an open source backend that can be deployed to any infrastructure that can run Node.js. Prior 9.5.2-alpha.2 and 8.6.15, an unauthenticated attacker can exhaust Parse Server resources (CPU, memory, database connections) through crafted queries that exploit the lack of complexity limits in the REST and GraphQL APIs. All Parse Server deployments using the REST or GraphQL API are affected. This vulnerability is fixed in 9.5.2-alpha.2 and 8.6.15.

Affected packages & fixed versions

Ecosystem	Package	Fixed in	Advisory
npm	parse-server	8.6.15	GHSA-cmj3-wx7h-ffvg
npm	parse-server	9.5.2-alpha.2	GHSA-cmj3-wx7h-ffvg

Affected products (as reported)

Vendor	Product	Versions
parse-community	parse-server	< 8.6.15>= 9.0.0 < 9.5.2-alpha.2

Weakness: CWE-770 · Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

References

https://github.com/parse-community/parse-server/security/advisories/GHSA-cmj3-wx7h-ffvg x_refsource_CONFIRM
https://github.com/parse-community/parse-server/releases/tag/8.6.15 x_refsource_MISC
https://github.com/parse-community/parse-server/releases/tag/9.5.2-alpha.2 x_refsource_MISC