What is CVE-2026-94408?

CVE-2026-94408 is a medium-severity vulnerability in Elastic Elasticsearch, classified under Uncontrolled Resource Consumption. CVSS score: 4.9/10. Published 2026-09-26.

How severe is CVE-2026-94408?

Medium severity. CVSS v3 base score is 4.9 out of 10.

Resource exhaustion in Elastic Elasticsearch

CVE-2026-94408

Uncontrolled Resource Consumption (CWE-400) in Elasticsearch can lead denial of service via Excessive Allocation (CAPEC-130)

Vulnerability class: DoS (Denial of Service)

Published 2026-09-26 · last modified 2026-09-26.

CVSS v3 metric

CVSS v3 base score 4.9 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H.

EPSS exploit prediction

No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.

Affected products

Elastic Elasticsearch

Weakness classification (CWE)

CWE-400 — Uncontrolled Resource Consumption

References

discuss.elastic.co/t/elasticsearch-8-19-22-9-4-7-9-5-3-security-update-esa-2026…

Frequently asked questions

What is CVE-2026-94408?: CVE-2026-94408 is a medium-severity vulnerability in Elastic Elasticsearch, classified under Uncontrolled Resource Consumption. CVSS score: 4.9/10. Published 2026-09-26.
How severe is CVE-2026-94408?: Medium severity. CVSS v3 base score is 4.9 out of 10.