high7.5
CVE-2026-33508
Parse Server is an open source backend that can be deployed to any infrastructure that can run Node.js.
Impact
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.
Affected packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| npm | parse-server | >= 9.0.0, < 9.6.0-alpha.45 | 9.6.0-alpha.45 |
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Parseplatform | Parse-Server | before 8.6.56 from 9.0.0 before 9.6.0 Version 9.6.0 |
Weakness classification
References
- NVD record
- CVE.org record
- GitHub advisory
- https://github.com/advisories/GHSA-6qh5-m6g3-xhq6
- 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://nvd.nist.gov/vuln/detail/CVE-2026-33508
- https://github.com/parse-community/parse-server/commit/060d27053fb0fadf613c25aabab7fe0c82b7a899
- https://github.com/parse-community/parse-server/commit/2126fe4e12f9b399dc6b4b6a3fa70cb1825f159b