CVE-2026-33508

HIGH SEVERITY

CVSS Score & Metrics

Base Score

7.5 / 10

Vector String

                                        CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H                                    

Vulnerability 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.

Vulnerability Details

Published Date

March 20, 2026

Last Modified

March 25, 2026

CWE ID

CWE-674

Source

GitHub

Vendor

npm

Product

parse-server

External References

https://github.com/parse-community/parse-server/security/advisories/GHSA-6qh5-m6g3-xhq6
https://github.com/parse-community/parse-server/pull/10259
https://github.com/parse-community/parse-server/pull/10260
https://github.com/advisories/GHSA-6qh5-m6g3-xhq6

CVE-2026-33508

CVSS Score & Metrics

Vulnerability Description

Vulnerability Details

External References

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