CVE-2026-33508
Parse Server: LiveQuery subscription query depth bypass
HIGH 8.2
At a glance
- Source
- NVD
- EPSS
- EPSS 0.35 % · percentile 29 ()
- State
- PUBLISHED
- Published
- Updated
- Assigner
- GitHub_M
- NVD status
- Analyzed
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.
Weaknesses (CWE)
- CWE-674 — Uncontrolled Recursion
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/parse-community/parse-server/commit/060d27053fb0fadf613c25aabab7fe0c82b7a899
- https://github.com/parse-community/parse-server/commit/2126fe4e12f9b399dc6b4b6a3fa70cb1825f159b
Scores
| Version | Score | Vector | Scored by |
|---|---|---|---|
| CVSS 4.0 | HIGH 8.2 | CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N | GitHub_M |
| CVSS 4.0 | HIGH 8.2 | CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X | NVD · security-advisories@github.com (Secondary) |
| CVSS 3.1 | HIGH 7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H | NVD · nvd@nist.gov (Primary) |
Advisories
- GHSA-6qh5-m6g3-xhq6 — Parse Server LiveQuery subscription query depth bypass
European references
- ENISA EUVD · EUVD-2026-20071
- GCVE · GCVE-0-2026-33508
Affected configurations (NVD CPE)
cpe:2.3:a:parseplatform:parse-server:*:*:*:*:*:node.js:*:*< 8.6.56cpe:2.3:a:parseplatform:parse-server:*:*:*:*:*:node.js:*:*≥ 9.0.0 < 9.6.0cpe:2.3:a:parseplatform:parse-server:9.6.0:alpha1:*:*:*:node.js:*:*cpe:2.3:a:parseplatform:parse-server:9.6.0:alpha10:*:*:*:node.js:*:*cpe:2.3:a:parseplatform:parse-server:9.6.0:alpha11:*:*:*:node.js:*:*cpe:2.3:a:parseplatform:parse-server:9.6.0:alpha12:*:*:*:node.js:*:*cpe:2.3:a:parseplatform:parse-server:9.6.0:alpha13:*:*:*:node.js:*:*cpe:2.3:a:parseplatform:parse-server:9.6.0:alpha14:*:*:*:node.js:*:*cpe:2.3:a:parseplatform:parse-server:9.6.0:alpha15:*:*:*:node.js:*:*cpe:2.3:a:parseplatform:parse-server:9.6.0:alpha16:*:*:*:node.js:*:*cpe:2.3:a:parseplatform:parse-server:9.6.0:alpha17:*:*:*:node.js:*:*cpe:2.3:a:parseplatform:parse-server:9.6.0:alpha18:*:*:*:node.js:*:*cpe:2.3:a:parseplatform:parse-server:9.6.0:alpha19:*:*:*:node.js:*:*cpe:2.3:a:parseplatform:parse-server:9.6.0:alpha2:*:*:*:node.js:*:*cpe:2.3:a:parseplatform:parse-server:9.6.0:alpha20:*:*:*:node.js:*:*cpe:2.3:a:parseplatform:parse-server:9.6.0:alpha21:*:*:*:node.js:*:*cpe:2.3:a:parseplatform:parse-server:9.6.0:alpha22:*:*:*:node.js:*:*cpe:2.3:a:parseplatform:parse-server:9.6.0:alpha23:*:*:*:node.js:*:*cpe:2.3:a:parseplatform:parse-server:9.6.0:alpha24:*:*:*:node.js:*:*cpe:2.3:a:parseplatform:parse-server:9.6.0:alpha25:*:*:*:node.js:*:*cpe:2.3:a:parseplatform:parse-server:9.6.0:alpha26:*:*:*:node.js:*:*cpe:2.3:a:parseplatform:parse-server:9.6.0:alpha27:*:*:*:node.js:*:*cpe:2.3:a:parseplatform:parse-server:9.6.0:alpha28:*:*:*:node.js:*:*cpe:2.3:a:parseplatform:parse-server:9.6.0:alpha29:*:*:*:node.js:*:*cpe:2.3:a:parseplatform:parse-server:9.6.0:alpha3:*:*:*:node.js:*:*cpe:2.3:a:parseplatform:parse-server:9.6.0:alpha30:*:*:*:node.js:*:*cpe:2.3:a:parseplatform:parse-server:9.6.0:alpha31:*:*:*:node.js:*:*cpe:2.3:a:parseplatform:parse-server:9.6.0:alpha32:*:*:*:node.js:*:*cpe:2.3:a:parseplatform:parse-server:9.6.0:alpha33:*:*:*:node.js:*:*cpe:2.3:a:parseplatform:parse-server:9.6.0:alpha34:*:*:*:node.js:*:*cpe:2.3:a:parseplatform:parse-server:9.6.0:alpha35:*:*:*:node.js:*:*cpe:2.3:a:parseplatform:parse-server:9.6.0:alpha36:*:*:*:node.js:*:*cpe:2.3:a:parseplatform:parse-server:9.6.0:alpha37:*:*:*:node.js:*:*cpe:2.3:a:parseplatform:parse-server:9.6.0:alpha38:*:*:*:node.js:*:*cpe:2.3:a:parseplatform:parse-server:9.6.0:alpha39:*:*:*:node.js:*:*cpe:2.3:a:parseplatform:parse-server:9.6.0:alpha4:*:*:*:node.js:*:*cpe:2.3:a:parseplatform:parse-server:9.6.0:alpha40:*:*:*:node.js:*:*cpe:2.3:a:parseplatform:parse-server:9.6.0:alpha41:*:*:*:node.js:*:*cpe:2.3:a:parseplatform:parse-server:9.6.0:alpha42:*:*:*:node.js:*:*cpe:2.3:a:parseplatform:parse-server:9.6.0:alpha43:*:*:*:node.js:*:*- +6 more
Affected products
| Product | Versions |
|---|---|
| parse-community · parse-server | affected < 8.6.56 ; affected >= 9.0.0, < 9.6.0-alpha.45 |
Sources
| Source | Licence |
|---|---|
| CVE List (CVEProject cvelistV5) | CVE Program Terms of Use |
| EPSS (FIRST.org) | FIRST — attribution requested |
| ENISA EUVD | ENISA — reproduction authorised, source acknowledged |
| NVD (NIST) via fkie-cad/nvd-json-data-feeds | Public domain — this product uses data from the NVD API but is not endorsed or certified by the NVD |