CVE-2023-31418

Elasticsearch uncontrolled resource consumption

HIGH
7.5
CVSS Score
Published: October 26, 2023 at 05:36 PM UTC
Updated: June 17, 2026 at 05:56 AM UTC
2 products affected across 1 vendorElasticsearchElastic Cloud Enterprise

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Severity
HIGH7.5
Exploit prediction
EPSS 2%

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

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

v ≤ 2.13.33.6.0
95%
v ≤ 7.17.122.13.3 ≤ v < 3.6.08.0.0 ≤ v ≤ 8.8.28.0.0 ≤ v < 8.8.22.13.37.17.128.0.0
Affected range stops below 3.6.0, so it looks safe — our inference, not a vendor statement
Affected range stops below 8.8.2, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

CVSS

7.5HIGHelastic
Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
HIGH
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-400

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