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CVE-2026-33508

Published: Mar 24, 2026

Modified: Mar 25, 2026

PUBLISHED

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.

Vendor	Product	Versions
parse-community	parse-server	affected `< 8.6.56` affected `>= 9.0.0, < 9.6.0-alpha.45`

Weaknesses (CWE)

References

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

x_refsource_CONFIRM

https://github.com/parse-community/parse-server/pull/10259

x_refsource_MISC

https://github.com/parse-community/parse-server/pull/10260

x_refsource_MISC

https://github.com/parse-community/parse-server/commit/060d27053fb0fadf613c25aabab7fe0c82b7a899

x_refsource_MISC

https://github.com/parse-community/parse-server/commit/2126fe4e12f9b399dc6b4b6a3fa70cb1825f159b

x_refsource_MISC

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