CVE-2026-31872CWE-284

Parse Server has a protected fields bypass via dot-notation in query and sort

High · published March 11, 2026

CVSS v4.0
8.7
EPSS
0%
Percentile
41.1
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 9.6.0-alpha.6 and 8.6.32, the protectedFields class-level permission (CLP) can be bypassed using dot-notation in query WHERE clauses and sort parameters. An attacker can use dot-notation to query or sort by sub-fields of a protected field, enabling a binary oracle attack to enumerate protected field values. This affects both MongoDB and PostgreSQL deployments. This vulnerability is fixed in 9.6.0-alpha.6 and 8.6.32.

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:H/VI:N/VA:N/SC:N/SI:N/SA:N
EPSS
0.00488 · 41.1th percentile
Weakness
CWE-284 · Improper Access Control
Published
2026-03-11T18:02Z
EPSS history
Timeline
  • 11 MAR 18:02Z
    Parse Server has a protected fields bypass via dot-notation in query and sort
    cvelistv5