CVE-2026-30938
MEDIUM
GHSA-q342-9w2p-57fp
CVSS Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
Lifecycle Timeline
3Tags
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.
Analysis
Parse Server versions prior to 8.6.12 and 9.5.1-alpha.1 allow attackers to bypass the requestKeywordDenylist security control by nesting prohibited keywords within objects or arrays in request payloads, enabling injection of restricted data into applications. This logic flaw affects all Parse Server deployments since the denylist is enabled by default, and custom keyword restrictions configured by developers are equally vulnerable to the same bypassing technique. …
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Remediation
Within 30 days: Identify affected systems and apply vendor patches as part of regular patch cycle. Vendor patch is available.
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