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CVE-2026-57480

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

HIGH
8.7
CVSS Score
Published: July 8, 2026 at 08:53 PM UTC
Updated: October 25, 2026 at 05:10 PM UTC
1 product affected across 1 vendorParse Server

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Severity
HIGH8.7
Exploit prediction
EPSS 0.6%
SSVC
No known exploit

Description

Parse 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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Parse Server· Parse Communitynpm
90%
v < 8.6.82>= 9.0.0-alpha.1, < 9.9.1-alpha.12
Affected range stops below 8.6.82, so it looks safe — our inference, not a vendor statement
Affected range stops below 9.9.1-alpha.12, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet, and no fixed version or vendor advisory is recorded against it.

References (7)

x_refsource_CONFIRM
Source: cverecord
https://github.com/parse-community/parse-server/security/advisories/GHSA-cgxm-vr2f-6fj8
x_refsource_MISC
Source: cverecord
https://github.com/parse-community/parse-server/pull/10511
x_refsource_MISC
Source: cverecord
https://github.com/parse-community/parse-server/pull/10512
x_refsource_MISC
Source: cverecord
https://github.com/parse-community/parse-server/commit/0f5d2ad77b422dc904458254548be87397fc6e9b
x_refsource_MISC
Source: cverecord
https://github.com/parse-community/parse-server/commit/1103c7a890e0455ba3dccd4bc5db17efe1789c9a
x_refsource_MISC
Source: cverecord
https://github.com/parse-community/parse-server/releases/tag/8.6.82
x_refsource_MISC
Source: cverecord
https://github.com/parse-community/parse-server/releases/tag/9.9.1-alpha.12

SSVC — Action Prioritization

SSVCNo known exploitAutomatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

8.7HIGHGitHub_M
Vector?

Quick Info

StatusDEFERRED
CWE
CWE-407

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