CVE-2026-102404 Uncontrolled Resource Consumption in Elasticsearch Leading to Denial of Service
A low-privileged user can cause Elasticsearch nodes to crash via memory exhaustion using crafted queries, leading to cluster unavailability.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-102404?
CVE-2026-102404 is a medium-severity denial of service vulnerability in Elastic Elasticsearch, published on 6 Oct 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official 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.
Weakness: CWE-400
Which versions are affected by CVE-2026-102404?
1 open source package ship an affected version, including elasticsearch. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
elasticsearch Bitnami | From 8.0.0 | 8.19.23, 9.4.8, 9.5.5 |
Products include Elastic Elasticsearch.
How do I fix CVE-2026-102404?
Upgrade elasticsearch to a fixed version for your release line: 8.19.23, 9.4.8 or 9.5.5.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2026-102404 being exploited?
There is no known exploitation of CVE-2026-102404 in the wild and no public exploit code.
Other vulnerabilities in Elastic Elasticsearch
- CVE-2015-1427 Elasticsearch Groovy Scripting Engine Remote Code Execution
- CVE-2014-3120 Elasticsearch Remote Code Execution
- CVE-2015-5377 Code injection in n/a
- CVE-2026-72649 Deserialization of Untrusted Data in Elasticsearch Leading to Remote Code Execution
- CVE-2026-72642 Use of Out-of-range Pointer Offset in the Elasticsearch Machine Learning Native Inference Process
Sources
Also known as AZL-106718, BIT-elasticsearch-2026-102404, GHSA-9h6g-vjpq-vfvx, MINI-4rcj-86c8-3hxr, MINI-5679-f95v-77hj, MINI-5q4j-5xw7-q682 and 18 more.