Unauthenticated DoS Vulnerability in Fleet Device Management Software
CVE-2026-26061

8.7HIGH

Key Information:

Vendor

Fleetdm

Status
Fleet
Vendor
CVE Published:
27 March 2026

What is CVE-2026-26061?

The Fleet device management software, prior to version 4.81.0, includes multiple unauthenticated HTTP endpoints that process request bodies without a defined size limit. This design oversight can be exploited by attackers who send large or repeated HTTP requests, leading to excessive memory consumption and ultimately causing a denial-of-service (DoS) condition. To mitigate this vulnerability, users are encouraged to upgrade to version 4.81.0 or later, where the issue has been addressed.

Affected Version(s)

fleet < 4.81.0

References

https://github.com/fleetdm/fleet/security/advisories/GHSA...
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CVSS V4

Score:
8.7
Severity:
HIGH
Confidentiality:
None
Integrity:
None
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.