CVE-2026-57480
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.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (0.59%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public 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.
- CVSS 4.0
- 8.7 HIGHCVSS: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/M
- EPSS
- 0.59% probability · 46th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-407
- Source
- security-advisories@github.com
References
- https://github.com/parse-community/parse-server/commit/0f5d2ad77b422dc904458254548be87397fc6e9b
- https://github.com/parse-community/parse-server/commit/1103c7a890e0455ba3dccd4bc5db17efe1789c9a
- https://github.com/parse-community/parse-server/pull/10511
- https://github.com/parse-community/parse-server/pull/10512
- https://github.com/parse-community/parse-server/releases/tag/8.6.82
- https://github.com/parse-community/parse-server/releases/tag/9.9.1-alpha.12
- https://github.com/parse-community/parse-server/security/advisories/GHSA-cgxm-vr2f-6fj8
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.