CVE-2026-103264Fleet before 4.87.0 Authentication Bypass via Device Identifiers
Updated under an hour ago ()
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EPSS puts the chance of exploitation in the next 30 days at 0.30%, higher than 22% of scored CVEs.
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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.
- CVSS
- 9.1 CRITICAL (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
- Weakness (CWE)
- CWE-287
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- 0.30% (percentile 22)
- Assigned by
- VulnCheck
- NVD analysis
- Analyzed
- Record last updated
- Oct 1, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
fleetdm fleet fleetdm:fleet (from the name) | before 4.87.0; 4.87.0 not affected | CNA record |
fleetdm fleet fleetdm:fleet | before 4.87.0 | NVD |
References
- https://github.com/fleetdm/fleet/security/advisories/GHSA-vrc8-2wcx-327fvendor-advisory
- https://www.vulncheck.com/advisories/fleet-before-4.87.0-authentication-bypass-via-device-identifiersthird-party-advisory
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.