TI-2026-50914 Aliases CVE-2026-72676 GHSA-hfcx-p43w-9wvx

Improper Control of Generation of Code in Fleet Server Leading to Code Injection

MEDIUM 42CWE-94Published 2026-08-13 · Updated 2026-08-13

Key facts

Attack vector: Network
Privileges required: None
User interaction: None
Attack complexity: Low
Impact type: Code execution
Confidentiality · integrity · availability: High · High · None
Fix status: No fix listed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-94.

Summary

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.00548 46th percentileScored 2026-11-07

Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: None
Automatable: No
Technical impact: Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
Elastic	Fleet Server	8.5.0 – 8.19.19; 9.0.0 – 9.4.4; 9.5.0	—	No fix listed	CNA

Fleet Server VendorElastic Affected 8.5.0 – 8.19.19; 9.0.0 – 9.4.4; 9.5.0 Fixed in — No fix listed CNA

CPE configurations NVD · 2

CPE	Versions	Role	Vendor
cpe:2.3:a:elastic:kibana::::::::	8.5.0 to before 8.19.20; 9.0.0 to before 9.4.5	Vulnerable	Elastic
cpe:2.3:a:elastic:kibana:9.5.0:::::::*	9.5.0	Vulnerable	Elastic

cpe:2.3:a:elastic:kibana:*:*:*:*:*:*:*:* Versions 8.5.0 to before 8.19.20; 9.0.0 to before 9.4.5 Vulnerable ·Elastic
cpe:2.3:a:elastic:kibana:9.5.0:*:*:*:*:*:*:* Versions 9.5.0 Vulnerable ·Elastic

Remediation

No fixed version listed by the sources yet.

Timeline

2026-10-02 Threatist record created from CVE-2026-72676
2026-10-03 Alias added: GHSA-hfcx-p43w-9wvx

References

Advisory 1

https://discuss.elastic.co/t/fleet-server-8-19-20-9-4-5-9-5-1-security-update-esa-2026-93/389510

TI-2019-05363 Code injection in Elastic Kibana KEVCVSS 3.1CRITICAL 10.0
TI-2018-12328 Kibana versions before 6.4.3 and 5.6.13 contain an arbitrary file inclusion flaw in the… CVSS 3.0CRITICAL 9.8
TI-2025-18692 Kibana arbitrary code execution via prototype pollution CVSS 3.1CRITICAL 9.8
TI-2020-05660 Code injection in Elastic Kibana CVSS 3.1HIGH 8.8
TI-2024-24803 Deserialization of untrusted data in Elastic Kibana CVSS 3.1CRITICAL 9.9
TI-2024-24800 Kibana arbitrary code execution via YAML deserialization CVSS 3.1CRITICAL 9.1

See all 188 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences