CVE-2026-26938 — HIGH (8.6)

Vulnerability Description

Improper Neutralization of Special Elements Used in a Template Engine (CWE-1336) exists in Workflows in Kibana which could allow an attacker to read arbitrary files from the Kibana server filesystem, and perform Server-Side Request Forgery (SSRF) via Code Injection (CAPEC-242). This requires an authenticated user who has the workflowsManagement:executeWorkflow privilege.

CVSS Score

8.6

HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

CHANGED

Confidentiality

HIGH

Integrity

NONE

Availability

NONE

Affected Products

Vendor	Product	Versions
Elastic	Kibana	9.3.0

Related Weaknesses (CWE)

CWE-1336

References

https://discuss.elastic.co/t/kibana-9-3-1-security-update-esa-2026-17/385253Vendor Advisory

FAQ

What is CVE-2026-26938?

CVE-2026-26938 is a vulnerability with a CVSS score of 8.6 (HIGH). Improper Neutralization of Special Elements Used in a Template Engine (CWE-1336) exists in Workflows in Kibana which could allow an attacker to read arbitrary files from the Kibana server filesystem, ...

How severe is CVE-2026-26938?

CVE-2026-26938 has been rated HIGH with a CVSS base score of 8.6/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2026-26938?

Check the references section above for vendor advisories and patch information. Affected products include: Elastic Kibana.