CVE-2026-33508
CVE-2026-33508 · Parse Server: LiveQuery subscription query depth bypass
This page contains facts from public vulnerability sources. Check the original advisory before updating.
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.
CVSS 8.2 · High · EPSS 0.6% · Fix available
- Published
- Updated
Stack: node
Affected products and versions
parse-server
- Versions
- < 8.6.56: Affected
- >= 9.0.0, < 9.6.0-alpha.45: Affected
No fix published
parse-server npm
- Affected ranges
- SEMVER: ≥ 9.0.0, < 9.6.0-alpha.45
Update to 9.6.0-alpha.45
parse-server npm
- Affected ranges
- SEMVER: < 8.6.56
Update to 8.6.56
Original sources
- 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/parse-community/parse-server/commit/060d27053fb0fadf613c25aabab7fe0c82b7a899
- https://github.com/parse-community/parse-server/commit/2126fe4e12f9b399dc6b4b6a3fa70cb1825f159b
- https://nvd.nist.gov/vuln/detail/CVE-2026-33508