Medium 6.5Published Jul 1, 2026

CVE-2026-56150Allocation of Resources Without Limits or Throttling in Fleet Server Leading to Denial of Service

Updated under an hour ago (Oct 27, 2026, 5:30 AM ET)

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It affects Elastic Fleet Server. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

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Every CVE for Elastic Fleet Server

Exploited in the last 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.

CVSS: 6.5 MEDIUM (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Weakness (CWE): CWE-770
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: elastic
NVD analysis: Analyzed
Record last updated: Jul 1, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

Elastic Fleet Server elastic:fleet_server (from the name)	from 9.0.0 through 9.2.4; from 8.0.0 through 8.19.10	CNA record
elastic fleet_server elastic:fleet_server	from 8.0.0 before 8.19.11; from 9.0.0 before 9.2.5	NVD

References

References

https://discuss.elastic.co/t/fleet-server-8-19-11-9-2-5-9-3-0-security-update-esa-2026-44	vendor-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.