CVE-2026-56145 Uncontrolled Resource Consumption in Elasticsearch Leading to Denial of Service
A low-privileged user can crash Elasticsearch nodes by sending crafted EQL sequence queries that cause excessive memory consumption.
- 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-2026-56145?
CVE-2026-56145 is a medium-severity denial of service vulnerability in Elastic Elasticsearch, published on 21 Jul 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 with permission to execute EQL sequence queries against an index they control can send a specially crafted query that triggers excessive memory consumption, causing the Elasticsearch node to crash.
Weakness: CWE-400
Which versions are affected by CVE-2026-56145?
1 open source package ship an affected version, including elasticsearch. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
elasticsearch Bitnami | From 8.0.0 | 8.19.18, 9.3.7, 9.4.4 |
Products include Elastic Elasticsearch.
How do I fix CVE-2026-56145?
Upgrade elasticsearch to a fixed version for your release line: 8.19.18, 9.3.7 or 9.4.4.
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-2026-56145 being exploited?
There is no known exploitation of CVE-2026-56145 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 BIT-elasticsearch-2026-56145, CLEANSTART-2026-VB21846, GHSA-5h86-ph4p-6p7w, MINI-22c2-q8xf-g27q, MINI-294p-f849-6pgp, MINI-55g8-wr8j-pgfv and 19 more.