What is CVE-2026-72685?

CVE-2026-72685 is a medium-severity vulnerability in Elastic Elasticsearch, classified under Inefficient Algorithmic Complexity. CVSS score: 4.3/10. Published 2026-08-13.

How severe is CVE-2026-72685?

Medium severity. CVSS v3 base score is 4.3 out of 10.

Vulnerability in Elastic Elasticsearch

CVE-2026-72685

A flaw in Elasticsearch allows a low-privileged authenticated user who can index documents to submit a single small document containing a crafted user-supplied input. Processing one such document occupies a worker thread from a bounded pool for a disproportionate amount of time, degrading the availability of indexing operations on the affected node.

CVSS v3 metric

CVSS v3 base score 4.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L.

Affected products

Elastic Elasticsearch — versions 8.0.0, 9.0.0

Weakness classification (CWE)

CWE-407 — Inefficient Algorithmic Complexity

References

security@elastic.co

Frequently asked questions

What is CVE-2026-72685?: CVE-2026-72685 is a medium-severity vulnerability in Elastic Elasticsearch, classified under Inefficient Algorithmic Complexity. CVSS score: 4.3/10. Published 2026-08-13.
How severe is CVE-2026-72685?: Medium severity. CVSS v3 base score is 4.3 out of 10.