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.

CVSS v3 6.5 MEDIUM

6.5^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 2.8 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References

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

Configurations

Configuration 1 (hide)

OR	cpe:2.3:a:elastic:fleet_server::::::::
	cpe:2.3:a:elastic:fleet_server::::::::

History

No history.

Information

Published : 2026-07-01 17:16

Updated : 2026-07-06 18:51

NVD link : CVE-2026-56150

Mitre link : CVE-2026-56150

CVE.ORG link : CVE-2026-56150

JSON object : View

Products Affected

elastic

fleet_server

CWE

CWE-770

Allocation of Resources Without Limits or Throttling

{"id": "CVE-2026-56150", "cveTags": [], "metrics": {"ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-56150", "role": "CISA Coordinator", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "version": "2.0.3", "timestamp": "2026-07-01T17:16:33.748948Z"}}], "cvssMetricV31": [{"type": "Secondary", "source": "security@elastic.co", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 6.5, "attackVector": "NETWORK", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "LOW", "confidentialityImpact": "NONE"}, "impactScore": 3.6, "exploitabilityScore": 2.8}, {"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 7.5, "attackVector": "NETWORK", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "NONE", "confidentialityImpact": "NONE"}, "impactScore": 3.6, "exploitabilityScore": 3.9}]}, "affected": [{"source": "security@elastic.co", "affectedData": [{"vendor": "Elastic", "product": "Fleet Server", "versions": [{"status": "affected", "version": "9.0.0", "versionType": "semver", "lessThanOrEqual": "9.2.4"}, {"status": "affected", "version": "8.0.0", "versionType": "semver", "lessThanOrEqual": "8.19.10"}], "defaultStatus": "unaffected"}]}], "published": "2026-07-01T17:16:37.060", "references": [{"url": "https://discuss.elastic.co/t/fleet-server-8-19-11-9-2-5-9-3-0-security-update-esa-2026-44", "tags": ["Vendor Advisory"], "source": "security@elastic.co"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Secondary", "source": "security@elastic.co", "description": [{"lang": "en", "value": "CWE-770"}]}], "descriptions": [{"lang": "en", "value": "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."}], "lastModified": "2026-07-06T18:51:50.527", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:elastic:fleet_server:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "2062CCB4-89BC-456B-A469-43C8F349E97A", "versionEndExcluding": "8.19.11", "versionStartIncluding": "8.0.0"}, {"criteria": "cpe:2.3:a:elastic:fleet_server:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "F1EDFFCE-61D3-48C5-9B63-4D676FA0A4BA", "versionEndExcluding": "9.2.5", "versionStartIncluding": "9.0.0"}], "operator": "OR"}]}], "sourceIdentifier": "security@elastic.co"}