How severe is CVE-2026-78598?

CVE-2026-78598 has a CVSS 3.x base score of 5.4, 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 low, and availability none.

Is CVE-2026-78598 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (14th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-78598?

CVE-2026-78598 affects Elastic Kibana. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-78598?

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

When was CVE-2026-78598 published?

CVE-2026-78598 was published on 2026-09-02 and last updated on 2026-09-03.

CVE-2026-78598

CVE-2026-78598 is a medium-severity vulnerability in Elastic Kibana with a CVSS 3.x base score of 5.4. 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-863.

Key facts

Severity: Medium (CVSS 3.x base score 5.4)
EPSS exploit prediction: 0% (14th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-863
Affected product: Elastic Kibana
Published: 2026-09-02
Last modified: 2026-09-03

Description

Incorrect Authorization (CWE-863) in the Kibana machine learning feature can lead to information disclosure via Exploiting Incorrectly Configured Access Control Security Levels (CAPEC-180). An authenticated user holding machine learning job management privileges within a single Kibana space could cause a job's saved object to become accessible across all spaces in the Kibana instance, without holding access rights to those additional spaces.

Frequently asked questions

What is CVE-2026-78598?: Incorrect Authorization (CWE-863) in the Kibana machine learning feature can lead to information disclosure via Exploiting Incorrectly Configured Access Control Security Levels (CAPEC-180). An authenticated user holding machine learning job management privileges within a single Kibana space could cause a job's saved object to become accessible across all spaces in the Kibana instance, without holding access rights to those additional spaces.
How severe is CVE-2026-78598?: CVE-2026-78598 has a CVSS 3.x base score of 5.4, 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 low, and availability none.
Is CVE-2026-78598 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (14th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-78598?: CVE-2026-78598 affects Elastic Kibana. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-78598?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2026-78598 published?: CVE-2026-78598 was published on 2026-09-02 and last updated on 2026-09-03.

References

https://discuss.elastic.co/t/kibana-8-19-19-9-3-8-9-4-4-security-update-esa-2026-156/390111

Affected products (1)

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

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