# CVE-2026-57481: Parse Server information disclosure in LiveQuery ACL transitions

Source: https://junglewise.ai/threats/cve-2026-57481-parse-server-information-disclosure-in-livequery-acl-transitions  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-07-08. Updated: 2026-07-08  
License: CC BY 4.0 with a link back

CVE-2026-57481 · Severity: medium · CVSS 4 · Published 2026-07-08

Parse Server is an open-source backend framework used to build and host applications. A security flaw in its real-time data synchronization feature (LiveQuery) could allow unauthorized users to view sensitive data. This occurs when a single update simultaneously changes a piece of data and the permissions for who can see it, potentially leaking information to users who should no longer have access.

Technologies: [parse-server (npm)](https://junglewise.ai/threats/technologies/parse-server). Vendors: [npm](https://junglewise.ai/threats/vendors/npm).

## Quick answers

**Is CVE-2026-57481 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-57481 being exploited in the wild.

**How severe is CVE-2026-57481?** Medium severity, with a CVSS score of 4, published 8 July 2026.

**Which products and versions are affected?** parse-server (npm) SEMVER:introduced=9.0.0,fixed=9.9.1-alpha.13.

**Is there a fix for CVE-2026-57481?** Yes. parse-server (npm): upgrade to 9.9.1-alpha.13 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2026-57481 attacked?** It is attacked over the network, in a software library.

**Am I affected by CVE-2026-57481?** Check whether you run parse-server (npm) at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## How to fix

- parse-server (npm): upgrade to 9.9.1-alpha.13 or later

  ```sh
  npm install parse-server@9.9.1-alpha.13
  ```


## Technical details

An information disclosure vulnerability exists in Parse Server's LiveQuery component due to incorrect object state handling during 'leave' and 'enter' events. When a single save operation modifies both an object field and the subscriber's ACL read access, the system may include unauthorized field values in the event notification sent to the subscriber. This occurs because the events are triggered using an incorrect state of the object relative to the permission change. The vulnerability is reachable over the network by an authenticated user with an active LiveQuery subscription. Patches are available in versions 9.9.1-alpha.13 and 8.6.83.

## Affected products

- parse-community parse-server >= 9.0.0-alpha.1, < 9.9.1-alpha.13; < 8.6.83

## Identifiers

- CVE-2026-57481
- GHSA-97pr-9hgg-3p8r

## Timeline

- 2026-06-19: patched: Fixes committed to repository
- 2026-07-08: disclosed: CVE published

## References

- [https://github.com/parse-community/parse-server/commit/c9b24cecfee76d8563019adaacbcbd78471dc41e](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/commit/e9c85dfe40a866a55ebae3b6ae56285ac0a22e64)
- [https://github.com/parse-community/parse-server/pull/10515](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/pull/10516)
- [https://github.com/parse-community/parse-server/releases/tag/8.6.83](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](https://github.com/parse-community/parse-server/releases/tag/9.9.1-alpha.13)
- [https://github.com/parse-community/parse-server/security/advisories/GHSA-97pr-9hgg-3p8r](https://github.com/parse-community/parse-server/security/advisories/GHSA-97pr-9hgg-3p8r)

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- [Parse Server stored XSS via malformed Content-Type bypass](https://junglewise.ai/threats/cve-2026-61448-parse-server-stored-xss-via-malformed-content-type-bypass)
- [Parse Community Parse Server denial of service via nested query operators](https://junglewise.ai/threats/cve-2026-57480-parse-community-parse-server-denial-of-service-via-nested-query)
- [Parse Server stored XSS via file upload extension bypass](https://junglewise.ai/threats/cve-2026-55778-parse-server-stored-xss-via-file-upload-extension-bypass)
- [Parse Server supply chain compromise via unreviewed version tags](https://junglewise.ai/threats/cve-2021-47986-parse-server-supply-chain-compromise-via-unreviewed-version-tags)