RCE in Elastic Fleet Server

CVE-2026-72676

Improper Control of Generation of Code ('Code Injection') (CWE-94) in Fleet Server can lead to the execution of attacker-supplied script content via Code Injection (CAPEC-242). Kibana accepted an identifier for an output configuration without restricting it to safe characters. That identifier is later placed into a server-side script that Fleet Server builds as part of routine agent policy processing, so script syntax embedded in the identifier became part of the script that was executed rather than being treated as data.

Vulnerability class: RCE (Remote Code Execution)

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:N.

Affected products

Weakness classification (CWE)

References

Frequently asked questions

What is CVE-2026-72676?
CVE-2026-72676 is a medium-severity vulnerability in Elastic Fleet Server, classified under Code Injection. CVSS score: 6.5/10. Published 2026-08-13.
How severe is CVE-2026-72676?
Medium severity. CVSS v3 base score is 6.5 out of 10.