CVE-2026-103006 Uncontrolled Recursion in Elasticsearch Leading to Denial of Service
An authenticated user can cause a denial of service in Elasticsearch by submitting deeply nested aggregation requests that trigger uncontrolled recursion.
- 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-2026-103006?
CVE-2026-103006 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 Recursion (CWE-674) in Elasticsearch can lead to Denial of Service via a specially crafted, deeply nested request submitted to the aggregation feature of the search API. Elasticsearch contains an uncontrolled recursion weakness in its search aggregation processing. An authenticated user with read access to a single index can submit a specially crafted request containing deeply nested aggregation definitions. Processing this request triggers unbounded recursive execution that exhausts the server process's available resources, causing the affected node to terminate. The node does not recover automatically and requires manual intervention to restore service.
Weakness: CWE-674
Which versions are affected by CVE-2026-103006?
1 open source package ship an affected version, including elasticsearch. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
elasticsearch Bitnami | From 8.0.0 | 8.19.21, 9.4.6, 9.5.2 |
Products include Elastic Elasticsearch.
How do I fix CVE-2026-103006?
Upgrade elasticsearch to a fixed version for your release line: 8.19.21, 9.4.6 or 9.5.2.
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-2026-103006 being exploited?
There is no known exploitation of CVE-2026-103006 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-106724, BIT-elasticsearch-2026-103006, CLEANSTART-2026-GV77140, GHSA-crr5-288w-ffvf, MINI-4qff-rwfj-5fwp, MINI-5fq5-43gv-jrxv and 19 more.