CVE-2026-72657
Published:August 13, 2026
Updated:August 31, 2026
Authorization Bypass Through User-Controlled Key (CWE-639) in Fleet Server can lead to information disclosure via Manipulating User-Controlled Variables (CAPEC-77). The authorization decision for artifact downloads relied on a client-supplied value that was persisted without being validated against the server-side record of the requesting agent's assignment. An authenticated party in possession of a valid enrolled agent credential could therefore retrieve a policy the agent is not assigned to.
Affected Packages
https://github.com/elastic/fleet-server.git (GITHUB):
Affected version(s) >=v9.0.0 <v9.4.5Fix Suggestion:
Update to version v9.4.5https://github.com/elastic/fleet-server.git (GITHUB):
Affected version(s) =v9.5.0 <v9.5.1Fix Suggestion:
Update to version v9.5.1https://github.com/elastic/fleet-server.git (GITHUB):
Affected version(s) >=v8.3.0 <v8.19.20Fix Suggestion:
Update to version v8.19.20Related Resources (1)
Do you need more information?
Contact UsCVSS v4
Base Score:
7.1
Attack Vector
NETWORK
Attack Complexity
LOW
Attack Requirements
NONE
Privileges Required
LOW
User Interaction
NONE
Vulnerable System Confidentiality
HIGH
Vulnerable System Integrity
NONE
Vulnerable System Availability
NONE
Subsequent System Confidentiality
NONE
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
CVSS v3
Base Score:
6.5
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
NONE
Availability
NONE
Weakness Type (CWE)
Authorization Bypass Through User-Controlled Key
EPSS
Base Score:
0.27