CVE-2026-78587

Incorrect Authorization in Fleet Server Leading to Denial of Service of Agent Upload Operations

Published Sep 2, 2026 CVSS 3.1 · 3.1 Low EPSS < 1% KEV · Not listed
Description
Incorrect Authorization (CWE-863) in Fleet Server can lead to a denial of service of agent upload operations via Privilege Abuse (CAPEC-122). Fleet Server does not correctly verify session ownership during multi-part data upload operations, allowing any authenticated agent to interfere with the active upload sessions belonging to other enrolled agents.

Remediation

No solution or workaround provided in the CVE record

Tracking

Sign in to view the affected projects.

Advisories

No advisories available
History
Type Values Removed Values Added
CPEs cpe:2.3:a:elastic:fleet_server:*:*:*:*:*:*:*:*
Type Values Removed Values Added
First Time appeared Elastic
Elastic fleet Server
Vendors & Products Elastic
Elastic fleet Server
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
Description Incorrect Authorization (CWE-863) in Fleet Server can lead to a denial of service of agent upload operations via Privilege Abuse (CAPEC-122). Fleet Server does not correctly verify session ownership during multi-part data upload operations, allowing any authenticated agent to interfere with the active upload sessions belonging to other enrolled agents.
Title Incorrect Authorization in Fleet Server Leading to Denial of Service of Agent Upload Operations
Weaknesses CWE-863
References
Metrics cvssV3_1

{'score': 3.1, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:L'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
elastic
Published
Updated
Sep 2, 2026, 3:58 PM
Reserved
Aug 24, 2026, 9:13 PM
Status
Analyzed
Published
Sep 2, 2026, 3:17 PM
Modified
Sep 3, 2026, 7:11 PM