CVE-2026-57480CWE-407

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

High · published July 8, 2026

CVSS v4.0
8.7
EPSS
1%
Percentile
47.5
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v4.0
8.7 · HIGH
Vector
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
EPSS
0.00590 · 47.5th percentile
Weakness
CWE-407 · Inefficient Algorithmic Complexity
Published
2026-07-08T20:53Z
EPSS history
Timeline
  • 08 JUL 20:53Z
    Parse Server: Denial of service via exponential-time processing of deeply nested query operators
    cvelistv5