Medium severity · published Mar 10, 2026
CVE-2026-30938
Parse Server has denylist `requestKeywordDenylist` keyword scan bypass through nested object placement
5.3
CVSS
0.4%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
None
Integrity
Low
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.4% · higher than 36% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
PA
parse-server · parse-community
< 8.6.12; >= 9.0.0 < 9.5.1-alpha.1 · source: vendor, NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-30938
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-30938
Product
https://github.com/parse-community/parse-server/releases/tag/8.6.12
Product
https://github.com/parse-community/parse-server/releases/tag/9.5.1-alpha.1
Mitigation
https://github.com/parse-community/parse-server/security/advisories/GHSA-q342-9w2p-57fp
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