Parse Server: Denial of service via exponential-time processing of deeply nested query operators

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Summary

CVECVE-2026-57480
StatePUBLISHED
AssignerGitHub_M
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-07-08 21:16:50 UTC
Updated2026-07-10 19:07:46 UTC
DescriptionParse Server is an open source backend that can be deployed to any infrastructure that can run Node.js. Prior to 9.9.1-alpha.12 and 8.6.82, deeply nested $or, $and, and $nor query condition operators in the REST API or LiveQuery query handling could trigger exponential-time processing in the internal query-traversal helper and block the Node.js event loop. This issue is fixed in versions 9.9.1-alpha.12 and 8.6.82.

Risk And Classification

Primary CVSS: v4.0 8.7 HIGH from [email protected]

CVSS:4.0/AV:N/AC:L/AT:N/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

EPSS: 0.003350000 probability, percentile 0.255780000 (date 2026-07-13)

Problem Types: CWE-407 | CWE-407 CWE-407: Inefficient Algorithmic Complexity

VersionSourceTypeScoreSeverityVector
4.0[email protected]Secondary8.7HIGHCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/C...
4.0CNADECLARED8.7HIGHCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

CVSS v4.0 Breakdown

Attack Vector
Network
Attack Complexity
Low
Attack Requirements
None
Privileges Required
None
User Interaction
None
Confidentiality
None
Integrity
None
Availability
High
Sub Conf.
None
Sub Integrity
None
Sub Availability
None

CVSS:4.0/AV:N/AC:L/AT:N/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

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Parse-community Parse-server affected >= 9.0.0-alpha.1, < 9.9.1-alpha.12 Not specified
CNA Parse-community Parse-server affected < 8.6.82 Not specified

References

ReferenceSourceLinkTags
github.com/parse-community/parse-server/releases/tag/9.9.1-alpha.12 [email protected] github.com
github.com/parse-community/parse-server/commit/1103c7a890e0455ba3dccd4bc... [email protected] github.com
github.com/parse-community/parse-server/commit/0f5d2ad77b422dc9044582545... [email protected] github.com
github.com/parse-community/parse-server/security/advisories/GHSA-cgxm-vr... [email protected] github.com
github.com/parse-community/parse-server/releases/tag/8.6.82 [email protected] github.com
github.com/parse-community/parse-server/pull/10511 [email protected] github.com
github.com/parse-community/parse-server/pull/10512 [email protected] github.com
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