---
title: ECS known issues
description: Known issues are significant defects or limitations that may impact your implementation. These issues are actively being worked on and will be addressed...
url: https://docs-v3-preview.elastic.dev/elastic/ecs/pull/2638/release-notes/known-issues
products:
  - Elastic Common Schema (ECS)
applies_to:
  - Elastic Cloud Serverless: Generally available
  - Elastic Stack: Generally available
---

# ECS known issues
Known issues are significant defects or limitations that may impact your implementation.
These issues are actively being worked on and will be addressed in a future release.
Review known issues to help you make informed decisions, such as upgrading to a new version.

## 9.0.0

None at this time