CVE-2025-37731

Elasticsearch Improper Authentication

State: Published
Severity: 6.8 Medium
Published: Dec 15, 2025
Updated: Feb 26, 2026
Reserved: Apr 16, 2025

Description

Improper Authentication in Elasticsearch PKI realm can lead to user impersonation via specially crafted client certificates. A malicious actor would need to have such a crafted client certificate signed by a legitimate, trusted Certificate Authority.

Scores

CVSS	Score	Vector	Source
3.1	6.8 Medium	CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N	elastic

Weaknesses

CWE-287 Improper Authentication

Affected Products

Product	Versions
ElasticsearchElastic	7.0.0 through 7.17.29Affected 8.0.0 through 8.19.7Affected 9.0.0 through 9.1.7Affected 9.2.0 through 9.2.1Affected

References

https://discuss.elastic.co/t/elasticsearch-8-19-8-9-1-8-and-9-2-2-security-update-esa-2025-27/384063

Every record here comes from the CVE Program’s CVE List. © 1999–2026 The MITRE Corporation. CVE is a registered trademark of The MITRE Corporation. The records are reproduced under the CVE Program terms of use.