Allocation of Resources Without Limits or Throttling in Fleet Server - CVE-2026-56150
Published: July 2, 2026
Vulnerability identifier: #VU136681
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2026-56150
CWE-ID: CWE-770
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: Elastic Stack
Affected software:
Fleet Server
Fleet Server
Detailed vulnerability description
The vulnerability allows a remote user to cause a denial of service.
The vulnerability exists due to allocation of resources without limits or throttling in the upload endpoint when handling specially crafted requests. A remote user can submit a specially crafted request to cause a denial of service.
The issue may cause excessive memory consumption, which may render Fleet Server unavailable.
How to mitigate CVE-2026-56150
Install security update from vendor's website.