Review reviewHigh

CVE-2026-56150

Elastic Fleet Server, fleet server

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
7.5
EPSS
0.35%
27.4% percentile
CISA KEV
Not listed
Published
2026.07.02
PRIORITY ASSESSMENT

Review review

The CVSS severity warrants an early asset and exposure review.

Known exploitationNot established by KEV
Exploit probability0.35%
Technical severityCVSS 7.5

Vulnerability overview

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 product and versions

Product
Elastic Fleet Server, fleet server
Affected versions
9.0.0, 8.0.0, >= 8.0.0 < 8.19.11, >= 9.0.0 < 9.2.5
Fixed versions
8.19.11, 9.2.5

Recommended response sequence

Confirm exposure before applying a vendor-supported change.

Full remediation guide
  1. 1
    Identify

    Confirm that Elastic Fleet Server, fleet server and an affected version are present.

  2. 2
    Prioritize

    Combine exploitation signals with asset exposure and business criticality.

  3. 3
    Remediate

    Follow the vendor advisory or supported update path and preserve rollback options.

  4. 4
    Verify

    Recheck the version, service health, access paths, and relevant logs.

Technical data

CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CWE
CWE-770
CVE-2026-56150 — Elastic Fleet Server, fleet server | SECUFOCUS NOW