How severe is CVE-2026-78597?

CVE-2026-78597 has a CVSS 3.x base score of 4.3, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is low, integrity none, and availability none.

Is CVE-2026-78597 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (19th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-78597?

CVE-2026-78597 affects Elastic Kibana. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-78597?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2026-78597 published?

CVE-2026-78597 was published on 2026-09-01 and last updated on 2026-09-02.

CVE-2026-78597

CVE-2026-78597 is a medium-severity vulnerability in Elastic Kibana with a CVSS 3.x base score of 4.3. 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-862.

Key facts

Severity: Medium (CVSS 3.x base score 4.3)
EPSS exploit prediction: 0% (19th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-862
Affected product: Elastic Kibana
Published: 2026-09-01
Last modified: 2026-09-02

Description

Missing Authorization (CWE-862) in the Kibana Entity Store feature can lead to unauthorized credential creation via Accessing Functionality Not Properly Constrained by ACLs (CAPEC-1). An authenticated user holding only low-privilege Security feature access could invoke an administrative operation that creates and persists Elasticsearch API keys under the caller's identity, bypassing the elevated cluster and Kibana privileges that the documented Entity Store setup flow requires.

Frequently asked questions

What is CVE-2026-78597?: Missing Authorization (CWE-862) in the Kibana Entity Store feature can lead to unauthorized credential creation via Accessing Functionality Not Properly Constrained by ACLs (CAPEC-1). An authenticated user holding only low-privilege Security feature access could invoke an administrative operation that creates and persists Elasticsearch API keys under the caller's identity, bypassing the elevated cluster and Kibana privileges that the documented Entity Store setup flow requires.
How severe is CVE-2026-78597?: CVE-2026-78597 has a CVSS 3.x base score of 4.3, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is low, integrity none, and availability none.
Is CVE-2026-78597 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (19th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-78597?: CVE-2026-78597 affects Elastic Kibana. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-78597?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2026-78597 published?: CVE-2026-78597 was published on 2026-09-01 and last updated on 2026-09-02.

References

https://discuss.elastic.co/t/kibana-8-19-21-9-4-6-security-update-esa-2026-155/390072

Affected products (1)

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

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