Bamboo 12.1 release notes
December 2025
Released on
We’re proud to present Bamboo 12.1.
This release brings significant new features, platform upgrades, and important security improvements to help you build, test, and deploy with even greater confidence.
Take some time and read through the release notes to learn what we've prepared for you this time. Swing by our upgrade notes to check for any breaking changes if you plan to upgrade, and don’t forget to check out the full list of resolved issues.
Highlights
Bamboo 12.1 is a long-term support LTS release
This means we’ll continue to backport critical security and product bug fixes to 12.1 release throughout its standard 2-year support window. In addition, when architecturally possible, we’ll also backport all other security bug fixes.
This allows you to get the maximum value from our continuous product development without strictly following the frequent release cadence.
Long Term Support releases are designed specifically for larger, more complex instances – ones that require significant planning and effort to upgrade. We understand that upgrades for such instances can be few and far between, and so every one of them needs to count. So, if you can manage only one feature release upgrade every year, make sure it is to the latest LTS release.
Check out the Atlassian Data Center Bug Fix Policy and Security Bug Fix policies for more information.
What's new since the last LTS release?
New LTS releases may not introduce exclusive new features, but they still pack a slew of improvements over previous releases. Every LTS release contains all features introduced since the last one and provides fixes for known issues.
If you’re interested in learning more about a specific type of improvement, you can go to one of the following sections:
Top new features
Every release leading up to Bamboo 12.1 introduced its own set of exciting new features. See the following table for a brief overview of what we’ve added to Bamboo since release 10.2:
| 12.0 |
| Bamboo 12.0 release notes |
|---|---|---|
| 11.0 |
| Bamboo 11.0 release notes |
| 10.2 | This is an LTS release, which doesn’t introduce any new features to keep things running smoothly. | Bamboo 10.2 release notes |
Critical bug fixes
Apart from new features, every release includes a number of bug fixes. The following table lists the most critical issues we’ve resolved since Bamboo 10.2.
The table only lists resolutions to the bugs with the highest severity status. We recommend that you follow the links in the last column to see the full list of issues resolved in each release.
| 12.0 | Issues resolved in Bamboo 12.0 | |
|---|---|---|
| 11.0 | Issues resolved in Bamboo 11.0 | |
| 10.2 | Issues resolved in Bamboo 10.2 |
Upgrade notes
Starting with Bamboo Data Center 12.1, we've combined the upgrade notes and release notes into a single page. You’ll find all improvements and changes in one place, so there’s no need to switch between pages.
We’ve collected some important notes on upgrading to Bamboo 12.1.
Bamboo 12.1 is a long-term support (LTS) release. Normally, we don’t introduce new features in LTS releases but rather consolidate the ones' we’ve introduced since the last LTS release (Bamboo 10.2).
This summary lists changes categorized by release and severity:
Breaking changes
| 12.0 |
| Bamboo 12.0 upgrade notes |
|---|---|---|
| 11.0 |
| Bamboo 11.0 upgrade notes |
| 10.2 | No breaking changes | Bamboo 10.2 upgrade notes |
Deprecations
| 12.0 |
| Bamboo 12.0 upgrade notes |
|---|---|---|
| 11.0 |
| Bamboo 11.0 upgrade notes |
| 10.2 | No deprecations | Bamboo 10.2 upgrade notes |
Improvements
| 12.0 |
| Bamboo 12.0 upgrade notes |
|---|---|---|
| 11.0 |
| Bamboo 11.0 upgrade notes |
| 10.2 | No changes | Bamboo 10.2 upgrade notes |
Changes to supported platforms
See what changes are in store for the supported platforms in Bamboo. For more information about what the latest stable release of Bamboo supports, see Supported platforms.
End of support announcements
In this release, we’re removing support for:
Java 17 (Bamboo 12.0)
PostgreSQL 14 (Bamboo 11.0)
PostgreSQL 15 (Bamboo 12.0)
SQL Server 2017 (Bamboo 12.0)
MySQL 8.0 (Bamboo 12.1)
Check all End of support announcements.
New supported platforms
In this release, we’ve added support for:
PostgreSQL 18 (Bamboo 12.0)
Oracle 23ai (Bamboo 12.0)
MySQL 8.4 (Bamboo 12.0)
How to upgrade Bamboo
Before you upgrade, check app compatibility by visiting Checking app compatibility with application updates, or the Atlassian Marketplace to see if your app hosting is compatible with your product version.
See the Bamboo upgrade guide for a complete walk-through of the upgrade process that includes descriptions of all the available upgrade paths, prerequisites, and methods.
Known issues
This section contains information about any issues that we’ve discovered in our testing. We’re constantly keeping an eye out and if we find anything, we’ll let you know right here.
Resolved issues
Scroll through the list of the issues we’ve resolved throughout the lifecycle of Bamboo 12.1