﻿---
title: Fleet Server release notes
description: Review the changes, fixes, and more in each version of Fleet Server. To check for security updates, go to Security announcements for the Elastic Stack...
url: https://www.elastic.co/docs/release-notes/fleet-server
products:
  - Fleet
---

# Fleet Server release notes

Review the changes, fixes, and more in each version of Fleet Server.
To check for security updates, go to [Security announcements for the Elastic Stack](https://discuss.elastic.co/c/announcements/security-announcements/31).
<admonition title="Related release notes">
  Elastic Agent integrates and manages Beats for data collection, and Beats changes may impact Elastic Agent functionality. To check for Elastic Agent changes in Beats, go to [Beats release notes](https://staging-website.elastic.co/docs/release-notes/beats).
</admonition>


## 9.1.5


### Features and enhancements

- Update Go version to v1.25.1. [#5562](https://github.com/elastic/fleet-server/pull/5562)


## 9.1.4


### Fixes

- Reset trace links on bulk items when returning to pool. [#5317](https://github.com/elastic/fleet-server/pull/5317)
- Restore connection limiter. [#5372](https://github.com/elastic/fleet-server/pull/5372)  Restore connection level limiter to prevent OOM incidents.
  This limiter is used in addition to the request-level throttle so that when
  our in-flight requests reaches max_connections, a 429 is returned. If the
  total connections the server uses is over max_connections*1.1 the server drops
  the connection before the TLS handshake.
- Build fleet-server as fully static binary to restore OS matrix compatibility. [#5392](https://github.com/elastic/fleet-server/pull/5392) [#5262](https://github.com/elastic/fleet-server/issues/5262)


## 9.1.3


### Fixes

- Fix 503 handling in enrollment. [#5232](https://github.com/elastic/fleet-server/pull/5232) [#5197](https://github.com/elastic/fleet-server/issues/5197)
- Remove extra ES search when preparing agent policy. [#5283](https://github.com/elastic/fleet-server/pull/5283)


## 9.1.2

_No new features, enhancements, or fixes._

## 9.1.1


### Fixes

- Fix upgrade details download_rate as string handling. [#5198](https://github.com/elastic/fleet-server/pull/5198) [#5214](https://github.com/elastic/fleet-server/pull/5214) [#5183](https://github.com/elastic/fleet-server/pull/5183) [#5176](https://github.com/elastic/fleet-server/pull/5176) [#5164](https://github.com/elastic/fleet-server/issues/5164)


## 9.1.0


### Features and enhancements

- Add ability for enrollment to take an agent ID. [#4290](https://github.com/elastic/fleet-server/pull/4290) [#4226](https://github.com/elastic/fleet-server/issues/4226)
- Add migrate-action. [#4786](https://github.com/elastic/fleet-server/pull/4786)  Added new MIGRATE action type for moving agent to different cluster.
- Clear `agent.upgrade_attempts` when upgrade is complete. [#4528](https://github.com/elastic/fleet-server/pull/4528)  The new AutomaticAgentUpgradeTask Kibana task sets the upgrade_attempts property in agents it upgrades.
  This property is used to track upgrade retries and should therefore be cleared when the upgrade is complete.
- Make pbkdf2 settings validation FIPS compliant. [#4542](https://github.com/elastic/fleet-server/pull/4542)
- Update Go to v1.24.3. [#4891](https://github.com/elastic/fleet-server/pull/4891)
- Add version metadata to version command output. [#4820](https://github.com/elastic/fleet-server/pull/4820)  Add commit, buildtime, and FIPS distribution indicators to output of version command.
  Add fips-distribution attribute to initial startup log.
- Add rollback attribute to upgrade actions in preparation for enabling upgrade rollbacks in a future release. [#4838](https://github.com/elastic/fleet-server/issues/4838)


### Fixes

- Upgrade golang.org/x/net to v0.34.0 and golang.org/x/crypto to v0.32.0. [#4405](https://github.com/elastic/fleet-server/pull/4405)
- Fix host parsing in Elasticsearch output diagnostics. [#4765](https://github.com/elastic/fleet-server/pull/4765)
- Redact output in bootstrap config logs. [#4775](https://github.com/elastic/fleet-server/pull/4775)
- Mutex protection for remote bulker config. [#4776](https://github.com/elastic/fleet-server/pull/4776)  Use existing remote bulker mutex to control access to remote bulker configs.
- Enable dead code elimination. [#4784](https://github.com/elastic/fleet-server/pull/4784)  Add grpcnotrace build tags and ensure DCE (dead code elimination) is enabled.
  Reduce binary size by 34%
- Include the base error for json decode error responses. [#5069](https://github.com/elastic/fleet-server/pull/5069)


## 9.0.8


### Features and enhancements

- Update Go version to v1.25.1. [#5562](https://github.com/elastic/fleet-server/pull/5562)


## 9.0.7


### Fixes

- Reset trace links on bulk items when returning to pool. [#5317](https://github.com/elastic/fleet-server/pull/5317)
- Restore connection limiter. [#5372](https://github.com/elastic/fleet-server/pull/5372)  Restore connection level limiter to prevent OOM incidents.
  This limiter is used in addition to the request-level throttle so that once
  our in-flight requests reaches max_connections a 429 is returned, but if the
  total connections the server uses is over max_connections*1.1 the server drops
  the connection before the TLS handshake.
- Build fleet-server as fully static binary to restore OS matrix compatibility. [#5392](https://github.com/elastic/fleet-server/pull/5392) [#5262](https://github.com/elastic/fleet-server/issues/5262)


## 9.0.6


### Fixes

- Fix 503 handling in enrollment. [#5232](https://github.com/elastic/fleet-server/pull/5232) [#5197](https://github.com/elastic/fleet-server/issues/5197)
- Remove extra ES search when preparing agent policy. [#5283](https://github.com/elastic/fleet-server/pull/5283)


## 9.0.5


### Fixes

- Fix upgrade details download_rate as string handling. [#5217](https://github.com/elastic/fleet-server/pull/5217) [#5227](https://github.com/elastic/fleet-server/pull/5227) [#5176](https://github.com/elastic/fleet-server/pull/5176) [#5164](https://github.com/elastic/fleet-server/issues/5164)


## 9.0.4


### Fixes

- Include the base error for JSON decode error responses. [#5069](https://github.com/elastic/fleet-server/pull/5069)


## 9.0.3


### Features and enhancements

- Update Go version to v1.24.4. [#5025](https://github.com/elastic/fleet-server/pull/5025)


## 9.0.2


### Features and enhancements

- Update Go version to v1.24.3. [#4891](https://github.com/elastic/fleet-server/pull/4891)


## 9.0.1


### Fixes

- Fix host parsing in Elasticsearch output diagnostics. [#4765](https://github.com/elastic/fleet-server/pull/4765)
- Redact output in bootstrap config logs. [#4775](https://github.com/elastic/fleet-server/pull/4775)
- Mutex protection for remote bulker config. [#4776](https://github.com/elastic/fleet-server/pull/4776)  Use existing remote bulker mutex to control access to remote bulker configs.
- Enable dead code elimination. [#4784](https://github.com/elastic/fleet-server/pull/4784)  Add grpcnotrace build tags and ensure DCE (dead code elimination) is enabled.
  Reduce binary size by 34%


## 9.0.0


### Features and enhancements

- New setting allowing automatic deletion of unenrolled agents in Fleet settings. [#195544](https://github.com/elastic/kibana/pull/195544)
- Improves filtering and visibility of Uninstalled and Orphaned agents in Fleet, by differentiating them from Offline agents. [#205815](https://github.com/elastic/kibana/pull/205815)
- Introduces air-gapped configuration for bundled packages in Fleet. [#202435](https://github.com/elastic/kibana/pull/202435)
- Updates removed parameters of the Fleet -> Logstash output configurations. [#210115](https://github.com/elastic/kibana/pull/210115)
- Updates the maximum supported package version in Fleet. [#196675](https://github.com/elastic/kibana/pull/196675)
- Replaces the use of context.TODO and context.Background in logger function calls for most Fleet Server use cases. [#4168](https://github.com/elastic/fleet-server/pull/4168) and [#3087](https://github.com/elastic/fleet-server/issues/3087)
- Refactor the Fleet Server API constructor to use functional opts instead of a long list of pointers. [#4169](https://github.com/elastic/fleet-server/pull/4169) and [#3823](https://github.com/elastic/fleet-server/issues/3823)
- Removes the deprecated policy_throttle configuration setting in favour of the newer policy-limit for Fleet Server. [#4288](https://github.com/elastic/fleet-server/pull/4288)
- Removes old bundled.yaml from oas, fixed tags. [#194788](https://github.com/elastic/kibana/pull/194788)
- Adds the ability for Elastic Agent to enroll using a specific ID. [#4290](https://github.com/elastic/fleet-server/pull/4290) and [#4226](https://github.com/elastic/fleet-server/issues/4226)


### Fixes

- Fixes a validation error that occurs on multi-text input fields in Fleet. [#205768](https://github.com/elastic/kibana/pull/205768)
- Adds a context timeout to the bulker flush in Fleet Server so it times out if it takes more time than the deadline. [#3986](https://github.com/elastic/fleet-server/pull/3986)
- Removes a race condition that may occur when remote Elasticsearch outputs are used in Fleet Server. [#4171](https://github.com/elastic/fleet-server/pull/4171)
- Uses the chi/middleware.Throttle package to track in-flight requests and return a 429 response when the limit is reached in Fleet Server. [#4402](https://github.com/elastic/fleet-server/pull/4402) and [#4400](https://github.com/elastic/fleet-server/issues/4400)
