Vulnerability · Published Aug 13, 2026 · Assigned by elastic
CVE-2026-72676Improper Control of Generation of Code in Fleet Server Leading to Code Injection
Medium 6.5
In plain English
A medium-severity code injection in Fleet Server from Elastic. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.5% (higher than 46% of all known vulnerabilities).
Official description
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.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Elastic | Fleet Server | 8.5.0 – through 8.19.199.0.0 – through 9.4.49.5.0 |
Weakness: CWE-94 · Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:N