7.5
High
CVE-2023-31418 An issue has been identified with how Elasticsearch handled incoming requests on the HTTP layer
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.
Affected products and versions
| Product | Affected versions | Fixed in |
|---|---|---|
| Elasticsearch 8.0 | 8.0.0 → < 8.8.2 | 8.8.2 |
| Elasticsearch | 7.17.12 | No fix stated |
| Elasticsearch 2.13 | 2.13.3 → < 3.6.0 | 3.6.0 |
Other CVEs of Elasticsearch
The 91 CVEs of Elasticsearch →
CVE-2026-115715
Allocation of Resources Without Limits or Throttling (CWE-770) in Elasticsearch can lead to denial of service via a…
6.5
Medium
CVE-2026-115710
Use of Cache Containing Sensitive Information (CWE-524) in Elasticsearch can lead to information disclosure and…
4.2
Medium
CVE-2026-115298
Incorrect Authorization (CWE-863) in Elasticsearch can lead to information disclosure via Accessing Functionality Not…
4.3
Medium
CVE-2026-115290
Uncontrolled Recursion (CWE-674) in Elasticsearch can lead to denial of service via Serialized Data with Nested Payloads…
7.5
High