CVE-2026-102411 Allocation of Resources Without Limits or Throttling in Elasticsearch Leading to Denial of Service
A user with manage_index_templates privilege can cause denial of service by registering multiple templates that exhaust heap memory when retrieved together.
- 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-2026-102411?
CVE-2026-102411 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
Allocation of Resources Without Limits or Throttling (CWE-770) in Elasticsearch can lead to Denial of Service via Excessive Allocation (CAPEC-130). Elasticsearch enforces a size limit on the user-supplied metadata field for each individual template resource, but does not limit the total memory used when multiple such resources are retrieved together. A user holding the *manage_index_templates* cluster privilege can register multiple resources each within the individual limit. Retrieving them together materializes all of their metadata values in memory at once, exhausting available heap and causing the affected node to fail with an out-of-memory error, resulting in a denial of service.
Weakness: CWE-770
Which versions are affected by CVE-2026-102411?
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, 9.4.7, 9.5.3 |
Products include Elastic Elasticsearch.
How do I fix CVE-2026-102411?
Upgrade elasticsearch to a fixed version for your release line: 8.19.23, 9.4.7 or 9.5.3.
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-2026-102411 being exploited?
There is no known exploitation of CVE-2026-102411 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-106721, BIT-elasticsearch-2026-102411, CLEANSTART-2026-JZ62196, GHSA-qvfh-5p79-6753, MINI-2rcr-5vxv-8f26, MINI-32mc-hh7m-jgr3 and 19 more.