Vulnerability in Elastic Kibana
CVE-2026-72663
Inefficient Algorithmic Complexity (CWE-407) in Kibana can lead to denial of service via Input Data Manipulation (CAPEC-153). A specially crafted, deeply nested expression submitted to a Kibana TSVB visualization is evaluated with a worst-case cost that grows disproportionately with the size of the input. Because the evaluation runs synchronously, a single request consumes the Kibana request-processing thread indefinitely, and Kibana stops responding to all further requests until the service is restarted.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.
EPSS exploit prediction
EPSS: 0.004 (33.8th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 34th percentile — 33.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.003 · newest: 0.004 · change: +0.001
Affected products
- Elastic Kibana — versions 8.0.0, 9.0.0
Weakness classification (CWE)
References
- discuss.elastic.co/t/kibana-8-19-20-and-9-4-5-security-update-esa-2026-104/3895… (Mitigation, Vendor Advisory)
Frequently asked questions
- What is CVE-2026-72663?
- CVE-2026-72663 is a medium-severity vulnerability in Elastic Kibana, classified under Inefficient Algorithmic Complexity. CVSS score: 6.5/10. Published 2026-08-13.
- How severe is CVE-2026-72663?
- Medium severity. CVSS v3 base score is 6.5 out of 10.