CVE-2026-30972

Parse Server is an open source backend that can be deployed to any infrastructure that can run Node.js. Prior o 9.5.2-alpha.10 and 8.6.23, 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. An attacker can bundle multiple requests targeting a rate-limited endpoint into a single batch request to circumvent the configured rate limit. Any Parse Server deployment that relies on the built-in rate limiting feature is affected. This vulnerability is fixed in 9.5.2-alpha.10 and 8.6.23.

• CWE-799

• https://github.com/parse-community/parse-server/releases/tag/8.6.23Product, Release Notes
• https://github.com/parse-community/parse-server/releases/tag/9.5.2-alpha.10Product, Release Notes
• https://github.com/parse-community/parse-server/security/advisories/GHSA-775h-3xrc-c228Patch, Vendor Advisory

Published

Mar 10, 2026

Last Modified

Jun 17, 2026

Status

Analyzed

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
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