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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.

PUBLISHED Reserved 2026-06-24 | Published 2026-07-08 | Updated 2026-07-09 | Assigner GitHub_M




HIGH: 8.7CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

Problem types

CWE-407: Inefficient Algorithmic Complexity

Product status

>= 9.0.0-alpha.1, < 9.9.1-alpha.12
affected

< 8.6.82
affected

References

github.com/...server/security/advisories/GHSA-cgxm-vr2f-6fj8

github.com/parse-community/parse-server/pull/10511

github.com/parse-community/parse-server/pull/10512

github.com/...ommit/0f5d2ad77b422dc904458254548be87397fc6e9b

github.com/...ommit/1103c7a890e0455ba3dccd4bc5db17efe1789c9a

github.com/parse-community/parse-server/releases/tag/8.6.82

github.com/...unity/parse-server/releases/tag/9.9.1-alpha.12

cve.org (CVE-2026-57480)

nvd.nist.gov (CVE-2026-57480)

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