3.1Low
CVE-2026-78587Incorrect Authorization in Fleet Server Leading to Denial of Service of Agent Upload Operations
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.
Weakness (CWE):
CWE-863
Data: CVE.org, NVD, CISA KEV, FIRST EPSS, Ubuntu. Published as the sources state it, in English.
Affected products and versions
| Vendor | Product | Versions | |
|---|---|---|---|
| Elastic | Fleet Server | 8.0.0 – ≤ 8.19.15, 9.0.0 – ≤ 9.3.4, 9.4.0 – ≤ 9.4.1 |
References and patches
CPE matches (NVD) (3)
cpe:2.3:a:elastic:fleet_server:*:*:*:*:*:*:*:*≥ 8.0.0 < 8.19.16cpe:2.3:a:elastic:fleet_server:*:*:*:*:*:*:*:*≥ 9.0.0 < 9.3.5cpe:2.3:a:elastic:fleet_server:*:*:*:*:*:*:*:*≥ 9.4.0 < 9.4.2