Protection Mechanism Failure in Parse Server - CVE-2026-30938
Published: April 6, 2026
Vulnerability identifier: #VU124980
CSH Severity: Medium
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2026-30938
CWE-ID: CWE-693
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: Parse Community
Affected software:
Parse Server
Parse Server
Detailed vulnerability description
The vulnerability allows a remote attacker to bypass a keyword denylist protection.
The vulnerability exists due to protection mechanism failure in the requestKeywordDenylist keyword scanner when processing request payloads containing a nested object or array before a prohibited keyword. A remote attacker can send a specially crafted request payload to bypass a keyword denylist protection.
The requestKeywordDenylist security control is enabled by default, and custom denylist entries configured by the developer are affected as well.
How to mitigate CVE-2026-30938
Install security update from vendor's website.