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CVE-2026-78587

nvd nist
Published: Sep 2, 2026Modified: Sep 3, 2026

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3.1
Vector
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:L
Exploitability: 1.6 / Impact: 1.4
Source: security@elastic.co (Secondary)

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.

Affected (3)

Elastic
1 product
Fleet Server
Configuration A
3 vulnerable
Vulnerable SoftwareAffected Versions
Elastic
Fleet Server
From 8.0.0 to 8.19.16
Fleet Server
From 9.0.0 to 9.3.5
Fleet Server
From 9.4.0 to 9.4.2

Related CWEs

CWE-863
Incorrect Authorization
The product performs an authorization check when an actor attempts to access a resource or perform an action, but it does not correctly perform the check. This allows attackers to bypass intended access restrictions.

References (1)

Source: security@elastic.co
Vendor Advisory

Timeline

No history available yet.