CVE-2026-72657CWE-639

CVE-2026-72657

Medium · published August 14, 2026

CVSS v3.1
6.5
EPSS
0%
Percentile
31.3
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
6.5 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
CVSS v4.0
Not supplied
EPSS
0.00385 · 31.3th percentile
Weakness
CWE-639 · Authorization Bypass Through User-Controlled Key
Published
2026-08-14T00:17Z
Affected products (3)
ProductVersionsFixed in
elastic/fleet_server≥ 8.3.0, < 8.19.208.19.20
elastic/fleet_server≥ 9.0.0, < 9.4.59.4.5
elastic/fleet_serverall versions—
References (1)
https://discuss.elastic.co/t/fleet-server-8-19-20-9-4-5-9-5-1-security-update-esa-2026-112/389509 · [email protected]
EPSS history
Timeline
  • 13 AUG 19:13Z
    Authorization Bypass Through User-Controlled Key in Fleet Server Leading to Information Disclosure
    cvelistv5