CVE-2026-33508

HIGH

Parse Server: LiveQuery subscription query depth bypass

Title source: cna
STIX 2.1

Description

Parse Server is an open source backend that can be deployed to any infrastructure that can run Node.js. Prior to versions 8.6.56 and 9.6.0-alpha.45, Parse Server's LiveQuery component does not enforce the requestComplexity.queryDepth configuration setting when processing WebSocket subscription requests. An attacker can send a subscription with deeply nested logical operators, causing excessive recursion and CPU consumption that degrades or disrupts service availability. This issue has been patched in versions 8.6.56 and 9.6.0-alpha.45.

References (5)

Scores

CVSS v3 7.5
EPSS 0.0006
EPSS Percentile 19.3%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CISA SSVC

Vulnrichment
Exploitation none
Automatable no
Technical Impact partial

Details

CWE
CWE-674
Status published
Products (5)
npm/parse-server 9.0.0 - 9.6.0-alpha.45npm
parse-community/parse-server < 8.6.56
parse-community/parse-server >= 9.0.0, < 9.6.0-alpha.45
parseplatform/parse-server 9.6.0 alpha1 (44 CPE variants)
parseplatform/parse-server < 8.6.56
Published Mar 24, 2026
Tracked Since Mar 25, 2026