Vulnerability in Parse-Community Parse-Server
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
EPSS exploit prediction
EPSS: 0.006 (47.3th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 47th percentile — 47.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.003 · newest: 0.006 · change: +0.003
Affected products
- Parse-Community Parse-Server — versions >= 9.0.0 < 9.5.2-alpha.10, < 8.6.23
- Parseplatform Parse-Server — versions 9.5.2
Weakness classification (CWE)
References
- github.com/parse-community/parse-server/security/advisories/GHSA-775h-3xrc-c228 (Patch, Vendor Advisory)
- github.com/parse-community/parse-server/releases/tag/8.6.23 (Product, Release Notes)
- github.com/parse-community/parse-server/releases/tag/9.5.2-alpha.10 (Product, Release Notes)
Frequently asked questions
- What is CVE-2026-30972?
- CVE-2026-30972 is a high-severity vulnerability in Parse-Community Parse-Server, classified under CWE-799. CVSS score: 7.5/10. Published 2026-03-10.
- How severe is CVE-2026-30972?
- High severity. CVSS v3 base score is 7.5 out of 10.