CVE-2026-30938

MediumCVSS 5.3/10Last modified Jun 17, 2026

Description

Parse Server is an open source backend that can be deployed to any infrastructure that can run Node.js. Prior to 8.6.12 and 9.5.1-alpha.1, the requestKeywordDenylist security control can be bypassed by placing any nested object or array before a prohibited keyword in the request payload. This is caused by a logic bug that stops scanning sibling keys after encountering the first nested value. Any custom requestKeywordDenylist entries configured by the developer are equally by-passable using the same technique. All Parse Server deployments are affected. The requestKeywordDenylist is enabled by default. This vulnerability is fixed in 8.6.12 and 9.5.1-alpha.1. Use a Cloud Code beforeSave trigger to validate incoming data for prohibited keywords across all classes.

Metrics

CVSS 3.1 5.3/10CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

Weakness enumeration

CWE-693

Affected software

Vendor	Product	Versions
parse-community	parse-server	< 8.6.12; >= 9.0.0 < 9.5.1-alpha.1

References

https://github.com/parse-community/parse-server/releases/tag/8.6.12Product, Release Notes
https://github.com/parse-community/parse-server/releases/tag/9.5.1-alpha.1Product, Release Notes
https://github.com/parse-community/parse-server/security/advisories/GHSA-q342-9w2p-57fpMitigation, Patch, Vendor Advisory

Timeline

Published: Mar 10, 2026
Last modified: Jun 17, 2026
NVD status: Analyzed

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