Uncontrolled Resource Consumption in Elasticsearch Leading to Denial of Service

Description

Uncontrolled Resource Consumption (CWE-400) in Elasticsearch can lead to denial of service via Excessive Allocation (CAPEC-130). A low-privileged authenticated user can submit a specially crafted query that causes uncontrolled memory growth in the query processing engine, resulting in an out-of-memory condition that terminates the Elasticsearch node. The condition can be triggered repeatedly, including by queries embedded in shared resources, causing persistent cluster unavailability.

Scores

EPSS (exploitation in 30 days)

0.31% · top 76% of all CVEs (5 Nov 2026)

CISA SSVC

Exploitation: none · Automatable: no · Technical impact: partial

The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 6.5.

Weakness

• CWE-400 Uncontrolled Resource Consumption (opens in a new tab)All about CWE-400 and its CVEs

Affected products

• Elastic · Elasticsearch

  • affected 8.0.0 – ≤ 8.19.22
  • affected 9.0.0 – ≤ 9.4.7
  • affected 9.5.0 – ≤ 9.5.4

References (1)

• https://discuss.elastic.co/t/elasticsearch-8-19-23-9-4-8-9-5-5-security-update-esa-2026-185/390859 (opens in a new tab)

Sources

The same CVE in the primary databases and aggregators, to check against.

• CVE.org record (opens in a new tab)
• CVE List JSON (GitHub) (opens in a new tab)
• NVD (opens in a new tab)
• FIRST EPSS (opens in a new tab)
• OSV.dev (opens in a new tab)
• GitHub Advisories (opens in a new tab)
• CIRCL Vulnerability-Lookup (opens in a new tab)

Badge for a README or a ticket

[![CVE-2026-102404](https://trackcve.app/badge/CVE-2026-102404.svg)](https://trackcve.app/cve/CVE-2026-102404)

Record last updated 6 Oct 2026, 19:57 UTC.