How severe is CVE-2026-26938?

CVE-2026-26938 has a CVSS 3.x base score of 8.6, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.

Is CVE-2026-26938 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (17th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-26938?

CVE-2026-26938 affects Elastic Kibana. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-26938?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

Does CVE-2026-26938 have an EU (EUVD) identifier?

Yes. CVE-2026-26938 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-8873.

When was CVE-2026-26938 published?

CVE-2026-26938 was published on 2026-02-26 and last updated on 2026-06-17.

CVE-2026-26938

CVE-2026-26938 is a high-severity vulnerability in Elastic Kibana with a CVSS 3.x base score of 8.6. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-1336.

Key facts

Severity: High (CVSS 3.x base score 8.6)
EPSS exploit prediction: 0% (17th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-8873
Weakness: CWE-1336
Affected product: Elastic Kibana
Published: 2026-02-26
Last modified: 2026-06-17

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.

Frequently asked questions

What is CVE-2026-26938?: 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.
How severe is CVE-2026-26938?: CVE-2026-26938 has a CVSS 3.x base score of 8.6, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.
Is CVE-2026-26938 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (17th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-26938?: CVE-2026-26938 affects Elastic Kibana. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-26938?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2026-26938 have an EU (EUVD) identifier?: Yes. CVE-2026-26938 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-8873.
When was CVE-2026-26938 published?: CVE-2026-26938 was published on 2026-02-26 and last updated on 2026-06-17.

References

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

Affected products (1)

cpe:2.3:a:elastic:kibana:9.3.0:*:*:*:*:*:*:*

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