CVE-2026-72657Authorization Bypass Through User-Controlled Key in Fleet Server Leading to Information Disclosure
Updated under an hour ago ()
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It affects Elastic Fleet Server. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
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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.
- CVSS
- 6.5 MEDIUM (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
- Weakness (CWE)
- CWE-639
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- elastic
- NVD analysis
- Analyzed
- Record last updated
- Aug 13, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Elastic Fleet Server elastic:fleet_server (from the name) | from 8.3.0 through 8.19.19; from 9.0.0 through 9.4.4; 9.5.0 | CNA record |
elastic fleet_server elastic:fleet_server | from 8.3.0 before 8.19.20; from 9.0.0 before 9.4.5; 9.5.0 | NVD |
References
- https://discuss.elastic.co/t/fleet-server-8-19-20-9-4-5-9-5-1-security-update-esa-2026-112/389509vendor-advisory
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.