Parse Server has a rate limit bypass via batch request endpoint

Description

Parse Server’s rate limiting middleware is applied at the Express middleware layer, but the batch request endpoint (/batch) processes sub-requests internally by routing them directly through the Promise router, bypassing Express middleware including rate limiting.

Recommendation

Update the parse-server package to the latest compatible version. Followings are version details:

• Affected version(s): **< 8.6.23

  >= 9.0.0-alpha.1, < 9.5.2-alpha.10**

• Patched version(s): **8.6.23

  9.5.2-alpha.10**

References

• GHSA-775h-3xrc-c228
• CVE-2026-30972
• CWE-799
• CAPEC-310
• OWASP 2021-A4
• OWASP 2021-A6

Related Issues

• Parse Server has a stored XSS filter bypass via Content-Type MIME parameter and missing XML extension blocklist entries - CVE-2026-32728
• Parse Server has a LiveQuery protected-field guard bypass via array-like logical operator value - CVE-2026-34595
• Parse Server has a session field immutability bypass via falsy-value guard - CVE-2026-34574
• Parse Server has a protected fields bypass via LiveQuery subscription WHERE clause - CVE-2026-32098

You might also like:

Exploiting Server Version Disclosure

Apache and Express Path Traversal plus Nginx Restriction Bypass Tests with SmartScanner

Update Cheat Sheet for Developers

Tags:

npm

parse-server