How severe is CVE-2026-26936?

CVE-2026-26936 has a CVSS 3.x base score of 4.9, rated medium severity. It is exploitable over network with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2026-26936 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (24th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-26936?

CVE-2026-26936 affects Elastic Kibana. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-26936?

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

Does CVE-2026-26936 have an EU (EUVD) identifier?

Yes. CVE-2026-26936 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-8866.

When was CVE-2026-26936 published?

CVE-2026-26936 was published on 2026-02-26 and last updated on 2026-06-17.

CVE-2026-26936

CVE-2026-26936 is a medium-severity vulnerability in Elastic Kibana with a CVSS 3.x base score of 4.9. 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-1333.

Key facts

Severity: Medium (CVSS 3.x base score 4.9)
EPSS exploit prediction: 0% (24th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-8866
Weakness: CWE-1333
Affected product: Elastic Kibana
Published: 2026-02-26
Last modified: 2026-06-17

Description

Inefficient Regular Expression Complexity (CWE-1333) in the AI Inference Anonymization Engine in Kibana can lead Denial of Service via Regular Expression Exponential Blowup (CAPEC-492).

Frequently asked questions

What is CVE-2026-26936?: Inefficient Regular Expression Complexity (CWE-1333) in the AI Inference Anonymization Engine in Kibana can lead Denial of Service via Regular Expression Exponential Blowup (CAPEC-492).
How severe is CVE-2026-26936?: CVE-2026-26936 has a CVSS 3.x base score of 4.9, rated medium severity. It is exploitable over network with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2026-26936 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (24th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-26936?: CVE-2026-26936 affects Elastic Kibana. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-26936?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-26936 have an EU (EUVD) identifier?: Yes. CVE-2026-26936 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-8866.
When was CVE-2026-26936 published?: CVE-2026-26936 was published on 2026-02-26 and last updated on 2026-06-17.

References

https://discuss.elastic.co/t/kibana-8-19-11-9-2-5-security-update-esa-2026-14/385250

Affected products (1)

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

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