Medium 6.8Published Dec 15, 2025

CVE-2025-37731Elasticsearch Improper Authentication

Updated under an hour ago (Oct 26, 2026, 8:50 PM ET)

Does this affect you?

It affects Elasticsearch. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

Do this next

Start free and add your stack

Free account, 1 product

Every CVE for Elasticsearch

Exploited in the last 30 days

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.

CVSS: 6.8 MEDIUM (v3.1, CNA)CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N
Weakness (CWE): CWE-287
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: elastic
NVD analysis: Analyzed
Record last updated: Feb 26, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

Elastic Elasticsearch elastic:elasticsearch (from the name)	from 7.0.0 through 7.17.29; from 8.0.0 through 8.19.7; from 9.0.0 through 9.1.7; from 9.2.0 through 9.2.1	CNA record
elastic elasticsearch elastic:elasticsearch	from 7.0.0 through 7.17.29; from 8.0.0 before 8.19.8; from 9.0.0 before 9.1.8; from 9.2.0 before 9.2.2	NVD

References

References

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

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.