CVE-2026-56150: Elastic Fleet Server

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

Allocation of Resources Without Limits or Throttling (CWE-770) in Fleet Server can lead to a denial of service via Excessive Allocation (CAPEC-130). An attacker can submit a specially crafted request to an upload endpoint that causes excessive memory consumption, which may render Fleet Server unavailable.

Affected products

• Elastic Fleet Server: from 8.0.0, before 8.19.11 (fixed in 8.19.11); from 9.0.0, before 9.2.5 (fixed in 9.2.5)

Published 2026-07-01. Last modified 2026-07-06.