What is CVE-2026-115298?

CVE-2026-115298 is a medium-severity vulnerability in Elastic Elasticsearch, classified under Incorrect Authorization. CVSS score: 4.3/10. Published 2026-11-03.

How severe is CVE-2026-115298?

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

Auth bypass in Elastic Elasticsearch

CVE-2026-115298

Incorrect Authorization (CWE-863) in Elasticsearch can lead to information disclosure via Accessing Functionality Not Properly Constrained by ACLs (CAPEC-1). An authenticated user whose index access is restricted by field-level security can retrieve the value of a constant_keyword field that their role excludes. Some search and query features do not apply the field-level security restriction to this field type.

Vulnerability class: Broken Access Control

Published 2026-11-03 · last modified 2026-11-03.

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:L/I:N/A:N.

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-863 — Incorrect Authorization

References

discuss.elastic.co/t/elasticsearch-8-19-24-9-4-9-9-5-6-security-update-esa-2026…

Frequently asked questions

What is CVE-2026-115298?: CVE-2026-115298 is a medium-severity vulnerability in Elastic Elasticsearch, classified under Incorrect Authorization. CVSS score: 4.3/10. Published 2026-11-03.
How severe is CVE-2026-115298?: Medium severity. CVSS v3 base score is 4.3 out of 10.