Fleet before 4.87.0 Authentication Bypass via Device Identifiers
Fleet versions before 4.87.0 contain an authentication bypass vulnerability in the device API that accepts hostnames and hardware serials as authentication tokens in addition to device UUIDs. Unauthenticated attackers who know or guess these non-secret identifiers can authenticate as iOS/iPadOS hosts to read device data and trigger device-scoped actions including software installation and MDM migration.
CVE-2026-103264
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-2026-103264
fleet
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
Structured affected-version data
Original package identities and version rules from this source.
[
{
"vendor": "fleetdm",
"product": "fleet",
"versions": [
{
"status": "affected",
"version": "0",
"lessThan": "4.87.0",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "4.87.0",
"versionType": "semver"
}
],
"packageURL": "pkg:golang/github.com/fleetdm/fleet",
"defaultStatus": "unaffected"
}
]- Related CVEs
- CVE-2026-103264
Source reference:
/cveMetadata/cveId
Publisher severity
critical
Source reference: /containers/cna/metrics
- Event
- #5183 · Revision 1
- Added to Heist Feed
- Publisher date