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7.8
CVE-2026-30938: Parse Server allows unauthorized data to be sent with certain requests
CVE-2026-30938 · published 7 months ago
Summary
A security flaw in Parse Server's controls for restricting certain requests allows attackers to send data that should be blocked. This affects all Parse Server deployments, which are used in various infrastructure environments. To fix this issue, developers should use a Cloud Code trigger to validate incoming data for prohibited keywords.
What to do
- Update parse to version 9.5.1.
- Update parseadmin parse-server to version 8.6.12.
- Update parseadmin parse-server to version 9.5.1-alpha.1.
Affected software
| Ecosystem | Vendor | Product | Affected versions |
|---|---|---|---|
| Bitnami | – | parse |
>= 9.0.0, < 9.5.1 Fix: upgrade to 9.5.1
|
| npm | parseadmin | parse-server |
< 8.6.12 >= 9.0.0-alpha.1, < 9.5.1-alpha.1 Fix: upgrade to 8.6.12
|
| – | parseplatform | parse-server |
< 8.6.12 >= 9.0.0, < 9.5.1 cpe:2.3:a:parseplatform:parse-server:*:*:*:*:*:node.js:*:* |
Original advisory text
Parse Server has denylist `requestKeywordDenylist` keyword scan bypass through nested object placement
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.
References
- https://github.com/parse-community/parse-server/releases/tag/8.6.12 URL
- https://github.com/parse-community/parse-server/releases/tag/9.5.1-alpha.1 URL
- https://github.com/advisories/GHSA-q342-9w2p-57fp
- https://github.com/parse-community/parse-server Product
- https://nvd.nist.gov/vuln/detail/CVE-2026-30938 Vendor Advisory
- https://github.com/parse-community/parse-server/security/advisories/GHSA-q342-9w... Vendor Advisory
- https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/30xxx/CVE-2026-30938... Vendor Advisory
Internet-facing
14 days
Internal
60 days
- Not known to be exploited
- Can be exploited automatically
- Gives an attacker partial control
Severity
7.8
High
Type
CWE-693Protection Mechanism Failure
Timeline
Published10 Mar 2026
Updated4 Nov 2026
First seen10 Mar 2026
Sources
GHSA-q342-9w2p-57fp · GHSA
CVE-2026-30938 · NVD
GHSA-q342-9w2p-57fp · OSV
BIT-parse-2026-30938 · OSV
CVE-2026-30938 · OSV
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