CVE-2023-31419Public exploitNetwork attack vector

Authenticated node crash via crafted search query

Published Oct 26, 2023 · Updated Feb 13, 2025

Denial of service in Elastic Elasticsearch 7.0.0 through 7.17.12 and 8.0.0 through 8.9.0 allows remote authenticated users to crash nodes. The _search API processes crafted match-query strings without preventing the resulting stack exhaustion; the published exploit amplifies an oversized message value. Low-privilege API access is required, and successful requests can terminate availability of an affected node without disclosing or modifying data.

CVSS severity6.5
Medium
EPSS probability60.68%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Denial of service in Elastic Elasticsearch 7.0.0 through 7.17.12 and 8.0.0 through 8.9.0 allows remote authenticated users to crash nodes. The _search API processes crafted match-query strings without preventing the resulting stack exhaustion; the published exploit amplifies an oversized message value. Low-privilege API access is required, and successful requests can terminate availability of an affected node without disclosing or modifying data.

The record

CVE
CVE-2023-31419
Published
Oct 26, 2023
Updated
Feb 13, 2025
Vendor
Elastic
Product
Elasticsearch
Classifications
CWE-121, CWE-787, T1499.004
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Oct 26, 2023CVE publishedPublication date reported by the CVE source.
  2. Feb 13, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=7.0.0 <7.17.12
  2. Affected versionversion=8.0.0 <8.9.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Elastic · Elasticsearchversion=7.0.0 <7.17.12; version=8.0.0 <8.9.0

Published CVSS scores

7.5National Vulnerability DatabaseCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
6.5ElasticCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-121Stack-based Buffer Overflow
CWE-787Out-of-bounds Write
T1499.004Application or System Exploitation

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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