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Vulnerability record · CVE-2023-31418 · published 26 October 2023

CVE-2023-31418: Elasticsearch uncontrolled resource consumption vulnerability

Elastic · Elasticsearch

An issue has been identified with how Elasticsearch handled incoming requests on the HTTP layer. An unauthenticated user could force an Elasticsearch node to exit with an OutOfMemory error by sending a moderate number of malformed HTTP requests. The issue was identified by Elastic Engineering and we have no indication that the issue is known or that it is being exploited in the wild.

7.5 CVSS 3.1 High EPSS 2.1% · top 19.5% CWE-400 · Uncontrolled resource consumption
7.5CVSS 3.1 base score
2.1%EPSS exploitation probability, 30 days
NoNot in CISA KEV
2Affected product versions listed by NVD
6References
17 Jun 2026Last modified by NVD

Description

An issue has been identified with how Elasticsearch handled incoming requests on the HTTP layer. An unauthenticated user could force an Elasticsearch node to exit with an OutOfMemory error by sending a moderate number of malformed HTTP requests. The issue was identified by Elastic Engineering and we have no indication that the issue is known or that it is being exploited in the wild.

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

Affected products

2 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://discuss.elastic.co/t/elasticsearch-8-9-0-7-17-13-security-update/343616 Vendor Advisory
https://security.netapp.com/advisory/ntap-20231130-0005/
https://www.elastic.co/community/security Vendor Advisory
https://discuss.elastic.co/t/elasticsearch-8-9-0-7-17-13-security-update/343616 Vendor Advisory
https://security.netapp.com/advisory/ntap-20231130-0005/
https://www.elastic.co/community/security Vendor Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2023-31418), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.