CVE-2026-30972

Description

Parse Server is an open source backend that can be deployed to any infrastructure that can run Node.js. Prior o 9.5.2 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 and 8.6.23.

How to fix CVE-2026-30972

To remediate CVE-2026-30972, upgrade the affected package to a fixed version below.

• —upgrade to 8.6.23 or later
• —upgrade to 9.5.2-alpha.10 or later

Is CVE-2026-30972 being exploited?

Low — EPSS is 0.3%, meaning exploitation activity has not been observed at scale.

Affected packages (2)

• from 0, < 8.6.23, >= 9.0.0, < 9.5.2
• >= 9.0.0-alpha.1, < 9.5.2-alpha.10

CVSS scores

References (5)

• ADVISORYnvd.nist.gov/vuln/detail/CVE-2026-30972
• PATCHgithub.com/parse-community/parse-server
• WEBgithub.com/parse-community/parse-server/releases/tag/8.6.23
• WEBgithub.com/parse-community/parse-server/releases/tag/9.5.2-alpha.10