What is CVE-2026-56150?

CVE-2026-56150 is a medium-severity vulnerability in Elastic Fleet Server, classified under Allocation of Resources Without Limits or Throttling. CVSS score: 6.5/10. Published 2026-07-01.

How severe is CVE-2026-56150?

Medium severity. CVSS v3 base score is 6.5 out of 10.

Resource exhaustion in Elastic Fleet Server

CVE-2026-56150

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.

EPSS: 0.004 (27.6th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.

Affected products

Elastic Fleet Server — versions 9.0.0, 8.0.0
Elastic Fleet_server

Weakness classification (CWE)

CWE-770 — Allocation of Resources Without Limits or Throttling

References

security@elastic.co (Vendor Advisory)

Frequently asked questions

What is CVE-2026-56150?: CVE-2026-56150 is a medium-severity vulnerability in Elastic Fleet Server, classified under Allocation of Resources Without Limits or Throttling. CVSS score: 6.5/10. Published 2026-07-01.
How severe is CVE-2026-56150?: Medium severity. CVSS v3 base score is 6.5 out of 10.