# CVE-2026-50008: Parse Server authorization bypass via batch sub-requests

Source: https://junglewise.ai/threats/cve-2026-50008-parse-server-authorization-bypass-via-batch-sub-requests  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-06-12. Updated: 2026-06-19  
License: CC BY 4.0 with a link back

CVE-2026-50008 · Severity: medium · CVSS 4 · Published 2026-06-12

Parse Server is an open-source backend framework used to build and host mobile and web applications. A security flaw in its route filtering system allows attackers to bypass access restrictions by wrapping unauthorized requests inside a 'batch' command. While standard data permissions (ACLs) still apply, this allows attackers to interact with API endpoints that administrators intended to block entirely from external access.

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

## Quick answers

**Is CVE-2026-50008 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-50008 being exploited in the wild.

**How severe is CVE-2026-50008?** Medium severity, with a CVSS score of 4, published 12 June 2026.

**Which products and versions are affected?** parse-server (npm) >= 9.8.0, < 9.9.1-alpha.3, SEMVER:introduced=9.8.0,fixed=9.9.1-alpha.3.

**Is there a fix for CVE-2026-50008?** Yes. parse-server (npm): upgrade to 9.9.1-alpha.3 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2026-50008 attacked?** It is attacked over the network, in a software library.

**Am I affected by CVE-2026-50008?** 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.3 or later

  ```sh
  npm install parse-server@9.9.1-alpha.3
  ```


## Technical details

The 'routeAllowList' feature in Parse Server v9.8.0+ acts as an Express middleware to restrict access to specific REST API routes. However, the implementation only validates the top-level request URL. An attacker can use the '/batch' endpoint (if allowlisted) to submit sub-requests to any internal REST route, bypassing the allow-list check because the batch handler dispatches sub-requests directly to the internal router without re-verifying them against the allow-list. While internal authorization controls like ACLs and CLPs remain active, the network-level 'firewall' provided by routeAllowList is negated. The issue is fixed in version 9.9.1-alpha.3 by enforcing the allow-list check per sub-request.

## Affected products

- parse-community parse-server >= 9.8.0, < 9.9.1-alpha.3

## Identifiers

- CVE-2026-50008
- GHSA-p84r-h6rx-f2xr

## Timeline

- 2026-05-27: disclosed: Initial disclosure to vendor
- 2026-06-12: advisory: NVD publication date
- 2026-06-19: advisory: GitHub Advisory published

## References

- [https://api.github.com/users/offset](https://api.github.com/users/offset)
- [https://github.com/offset](https://github.com/offset)
- [https://api.github.com/users/offset/gists%7B/gist_id%7D](https://api.github.com/users/offset/gists%7B/gist_id%7D)
- [https://api.github.com/users/offset/repos](https://api.github.com/users/offset/repos)
- [https://avatars.githubusercontent.com/u/114768995?v=4](https://avatars.githubusercontent.com/u/114768995?v=4)
- [https://api.github.com/users/offset/events%7B/privacy%7D](https://api.github.com/users/offset/events%7B/privacy%7D)

## Related threats

- [Duplicate Advisory: Parse Server vulnerable to stored XSS via malformed Content-Type bypassing file upload extension blocklist](https://junglewise.ai/threats/duplicate-advisory-parse-server-vulnerable-to-stored-xss-via-malformed-00d8867c)
- [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 Server information disclosure in LiveQuery ACL transitions](https://junglewise.ai/threats/cve-2026-57481-parse-server-information-disclosure-in-livequery-acl-transitions)
- [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)