CVE-2026-33508Parse Server: LiveQuery subscription query depth bypass
Updated under an hour ago ()
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It affects parse-community parse-server and 1 other product. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
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Free account, 1 product
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 (v4.0, CNA)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
- Weakness (CWE)
- CWE-674
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- GitHub_M
- NVD analysis
- Analyzed
- Record last updated
- Mar 25, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
parse-community parse-server parse_community:parse_server (from the name) | before 8.6.56; from 9.0.0, < 9.6.0-alpha.45 | CNA record |
parseplatform parse-server parseplatform:parse-server | before 8.6.56; from 9.0.0 before 9.6.0; 9.6.0; 9.6.0; 9.6.0; 9.6.0; 9.6.0; 9.6.0; and 38 more ranges | NVD |
References
- https://github.com/parse-community/parse-server/security/advisories/GHSA-6qh5-m6g3-xhq6x-refsource-confirm, vendor-advisory
- https://github.com/parse-community/parse-server/pull/10259x-refsource-misc, issue-tracking
- https://github.com/parse-community/parse-server/pull/10260x-refsource-misc, issue-tracking
- https://github.com/parse-community/parse-server/commit/060d27053fb0fadf613c25aabab7fe0c82b7a899x-refsource-misc, patch
- https://github.com/parse-community/parse-server/commit/2126fe4e12f9b399dc6b4b6a3fa70cb1825f159bx-refsource-misc, patch
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.