CVE-2026-30938 Parse Server has denylist `requestKeywordDenylist` keyword scan bypass through nested object placement
Attackers can bypass the default requestKeywordDenylist security control in Parse Server by placing nested objects before prohibited keywords, allowing restricted data submission.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-30938?
CVE-2026-30938 is a medium-severity vulnerability in Parseplatform Parse-Server, published on 10 Mar 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official 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.
Weakness: CWE-693
Which versions are affected by CVE-2026-30938?
5 open source packages ship an affected version, including parse-server and parse. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
parse-server npm | All versions | 8.6.12 |
parse-server npm | All versions | 8.6.12 |
parse-server npm | From 9.0.0-alpha.1 | 9.5.1-alpha.1 |
parse-server npm | From 9.0.0-alpha.1 | 9.5.1-alpha.1 |
parse Bitnami | All versions | 8.6.12, 9.5.1 |
Products include Parseplatform Parse-Server.
How do I fix CVE-2026-30938?
Upgrade parse-server to a fixed version for your release line: 8.6.12 or 9.5.1-alpha.1.
Is CVE-2026-30938 being exploited?
There is no known exploitation of CVE-2026-30938 in the wild and no public exploit code.
Other vulnerabilities in Parseplatform Parse-Server
- CVE-2026-30966 Parse Server role escalation and CLP bypass via direct `_Join` table write
- CVE-2024-27298 Parse Server literalizeRegexPart SQL Injection
- CVE-2022-24760 Command Injection in Parse server
- CVE-2026-30965 Parse Server session token exfiltration via `redirectClassNameForKey` query parameter
- CVE-2023-36475 Parse Server vulnerable to remote code execution via MongoDB BSON parser through prototype pollution
Sources
Also known as BIT-parse-2026-30938, GHSA-q342-9w2p-57fp.