CVE-2023-31418

Name: CVE-2023-31418
Creator: NVD / NIST
Published: 2023-10-26T18:15:08.587+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.5/10EPSS 1.23%

Last modified Jun 17, 2026

CVE-2023-31418 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. 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. EPSS estimates a 1.23% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

7.5/10

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

EPSS Probability

1.23%

65.2th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Elastic	Elasticsearch	<= 7.17.12
Elastic	Elasticsearch	>= 8.0.0, <= 8.8.2
Elastic	Elastic Cloud Enterprise	<= 2.13.3
Elastic	Elastic Cloud Enterprise	3.6.0

References

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

Timeline

Published: Oct 26, 2023
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2023-31418?

How severe is CVE-2023-31418?

CVE-2023-31418 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 1.23% probability of exploitation in the next 30 days.

How do I fix CVE-2023-31418?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2023-31418?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST