Parse Server before 8.6.93 and 9.0.0 before 9.10.1-alpha.13 protectedFields Bypass via Relation Count Query
Parse Server before 8.6.93 and 9.0.0 before 9.10.1-alpha.13 does not enforce identity-scoped protectedFields (authenticated, role, or per-user groups) on count queries using the $relatedTo operator, exposing the size of protected Relation fields. An authenticated user who can read the owning object can combine counts with an objectId constraint as a membership oracle to reveal confidential memberships such as private groups or block lists.
CVE-2026-109303
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: cve:CVE-2026-109303
parse-server
Source reference: /containers/cna/affected/0/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
parse-server
Source reference: /containers/cna/affected/1/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"vendor": "parse-community",
"product": "parse-server",
"versions": [
{
"status": "affected",
"version": "9.0.0",
"lessThan": "9.10.1-alpha.13",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "9.10.1-alpha.13",
"versionType": "semver"
}
],
"packageURL": "pkg:npm/parse-server",
"defaultStatus": "unaffected"
},
{
"vendor": "parse-community",
"product": "parse-server",
"versions": [
{
"status": "affected",
"version": "0",
"lessThan": "8.6.93",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "8.6.93",
"versionType": "semver"
}
],
"packageURL": "pkg:npm/parse-server",
"defaultStatus": "unaffected"
}
]- Related CVEs
- CVE-2026-109303
Source reference:
/cveMetadata/cveId
Publisher severity
medium
Source reference: /containers/cna/metrics
- Event
- #20363 · Revision 1
- Added to Heist Feed
- Publisher date