CVE-2025-37731 MEDIUM

CVE-2025-37731: Elasticsearch Improper Authentication

Vendor Elastic
Product Elasticsearch
Weakness CWE-287 · Improper authentication
Published December 15, 2025
Last update February 26, 2026
View on NVD All CVEs

CVSS base score

6.8/10
Attack vector Network
Attack complexity High
Privileges required Low
User interaction None
Confidentiality High
Integrity High

CVSS vector

CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N

What the vulnerability does

01Description

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.

Key dates

02Disclosure timeline

December 15, 2025 CVE published
February 26, 2026 Record updated