CVE-2026-26061: Fleetdm Fleet

High severity, CVSS 7.5. EPSS: 0.5% chance of exploitation in the next 30 days.

Fleet is open source device management software. Prior to 4.81.0, Fleet contained multiple unauthenticated HTTP endpoints that read request bodies without enforcing a size limit. An unauthenticated attacker could exploit this behavior by sending large or repeated HTTP payloads, causing excessive memory allocation and resulting in a denial-of-service (DoS) condition. Version 4.81.0 patches the issue.

Affected products

• Fleetdm Fleet: before 4.81.0 (fixed in 4.81.0)

Published 2026-03-27. Last modified 2026-06-17.