Changelog

2.534

October 28, 2025
Major enhancement
Enhancement

2.533

October 21, 2025
Enhancement
Bug fix
  • Avoid stack overflow to prevent excessive work being performed when loading builds from disk. This could cause an error when using the Maven and Naginator plugins and the experimental build UI. JENKINS-76202

2.532

October 14, 2025
Enhancement
  • Change required input validator to reject strings that are only whitespace. pull 11143
  • Add support for tabs on the experimental run page. pull 11141
  • Remove deprecated and unused FormFieldValidator.NonNegativeInteger. pull 11176
  • Add German localization for proxy configuration. pull 11159
  • Add interface based constructor for AnnotatedLargeText. pull 11071

2.531

October 7, 2025
Enhancement
  • Add health check for failure to bind an enforced TCP agent port. pull 11145
  • Show build cause on experimental build UI. pull 11128
  • Move experimental run sidepanel to overflow menu. pull 11127

2.530

September 30, 2025
Enhancement
  • Add experimental Parameters dialog for builds. pull 11116
  • Refine experimental run details interface. pull 11096
  • Removed configureclouds redirect to clouds. pull 10982
Bug fix
  • Ensure file parameters are retained across Jenkins restarts. JENKINS-73161
  • Streamline logic to disconnect agents during controller shutdown. pull 11102

2.529

September 22, 2025
Enhancement
  • Optimize build lazy loading during iteration via RunMap.entrySet() and RunMap.keySet(). JENKINS-76075
  • Optimize LogRotator build iteration using RunMap.entrySet(). JENKINS-76075
  • Move the user time zone configuration to the user preferences page. pull 11065
  • Improve the display of help text for agent launch methods. pull 11055
Bug fix
  • Fix "All/None/Suggested" buttons visibility in plugin setup wizard. JENKINS-76114
  • Try harder to release controller memory after using some JavaScript features. JENKINS-16341
  • Fix number comparison in min/max form validator. JENKINS-76002

2.528

September 17, 2025
Security

2.527

September 9, 2025
Bug fix
  • Fix a race condition in WebSocket agent connection initialization. pull 11039

2.526

September 2, 2025
Enhancement
  • Improve UberClassLoader class caching. pull 10979
  • Expose NavigableMap interface from the CopyOnWrite.Tree map. Optimise the AbstractLazyLoadRunMap.search() method. JENKINS-76028
  • Add Polish translations. pull 11025

2.525

August 26, 2025
Enhancement
  • Refactor BuildReferenceMapAdapter to improve code re-usage. JENKINS-75986

2.524

August 19, 2025
Security
Enhancement
  • Pick a new name format for subdirectories of $JENKINS_HOME/users/. Stop creating redundant $JENKINS_HOME/users/users.xml. pull 10926
  • Reduce plugin ClassLoader memory consumption. JENKINS-75675
  • Minor performance optimization for administrative monitors badge display. pull 10855
  • Show parameters of a run in read-only mode. pull 10941
Bug fix
  • Create friendlier HTTP response for an attempt to buildWithParameters a disabled or nonparameterized job. pull 10954
  • Fix incorrect parameter name in quietDown API online help. JENKINS-75991
  • Fix memory leak in Java class loading for the GStringTemplateEngine class. JENKINS-75879

2.523

August 12, 2025
Enhancement
  • Apply the current theme color palette to shutdown and safe-restart messages. pull 10945
  • Reduce agent launch log stack trace noise for ClosedChannelExceptions. pull 10927
  • Refine the Add button for repeatable lists. pull 10913
  • Fix text spacing in the Bulgarian localization. pull 10943
  • Developer: Objects with getName, getFullName, and getFullDisplayName can now be referred through dedicated interfaces. pull 10827
Bug fix
  • Remove the styling of a link in a menu when the corresponding menu is closed. JENKINS-75927
  • Position the Save and Apply buttons for views under the header instead of over it. JENKINS-75937

2.522

August 5, 2025
Enhancement
  • Refine User page UI. pull 10807
  • Use secondary text color for dropdown filter. pull 10901
  • Refine Experiments page UI. pull 10902
  • Breadcrumbs now have a visual indicator and are compatible with accessibility guidelines. JENKINS-75851
Bug fix
  • Correct word-wrap and word-break CSS properties to use supported values. pull 10881

2.521

July 29, 2025
Enhancement
  • Add a visible separator between the bottom app bar and Jenkins UI. pull 10853
Bug fix
  • Stop printing an incorrect message from Slave.warnPlugin. pull 10863

2.520

July 22, 2025
Enhancement
Bug fix
  • Restore breadcrumb navigation for the System configuration page. JENKINS-75637

2.519

July 15, 2025
Enhancement
  • Remove the /extensionList/ HTTP endpoint and related telemetry. Users of the Timestamper plugin should update to version 1.29 or newer. pull 10752
  • Add German translation for Global Build Discarder. pull 10835
  • Refine colors and borders. pull 10814
Bug fix
  • Only hide the dropdown on the breadcrumbs, not on other menus. JENKINS-75834

2.518

July 8, 2025
Enhancement
  • Refine alignment of the header, app bar, and side panel. pull 10806
  • SSH cli now uses support of EdDSA natively provided by Apache Mina via Bouncycastle. pull 10788
Bug fix
  • Actions with Alerts now display correctly in the new header when in the hamburger menu. JENKINS-75832
  • Make script console layout configurable. JENKINS-75849
  • Improve UI of secondary actions in the header. JENKINS-75853
  • Enable the chevron button in job tables by removing pointerevents:none from its CSS styling. JENKINS-75252
  • Fix multiple dropdowns for the breadcrumb navigation becoming visible. JENKINS-75834

2.517

July 1, 2025
Enhancement
  • Add window listener computeOverflow to trigger a new compute of the breadcrumbs JENKINS-75818
  • Developer: Asynchronous periodic work executions can now be queued. pull 10716
Bug fix
  • Avoid queue items being lost if the node disconnects at a bad time during allocation. pull 10756

2.516

June 24, 2025
Bug fix
  • Place secondary actions in the collapsing menu instead of displaying them based on screen width. JENKINS-75727
  • Any RootAction that used custom rendering (action.jelly) is once again visible in the header and behaves appropriately. Any RootAction that uses jelly to show/hide is correctly hidden in the header. Any RootAction with sub tasks now shows the subtasks as a dropdown when in the correct context. JENKINS-75683
  • Do not hide contents of Execute shell, parameter descriptions, and other CodeMirror components after skeleton loading. JENKINS-75794
Enhancement
  • Developer: System properties can now use flexible time units: 30s, 3m, 1h, 2d, etc. pull 10561

2.515

June 17, 2025
Bug fix
  • Replace Loading overlay with skeleton outline on Manage Jenkins pages. JENKINS-68934

2.514

June 10, 2025
Enhancement
  • Refine dialog and Command Palette appearances. pull 10721
Bug fix
  • Fix URLs in search result list when running at `root` context. pull 10725
  • Restore side panel actions for views. JENKINS-75683

2.513

June 3, 2025
Enhancement
  • Add a copy to clipboard button to the Jenkins error page. pull 10712
  • Complete the Japanese translation for keepDependencies help file. pull 10366
  • When running in Jetty (when using java -jar jenkins.war, the default), set the SameSite attribute for cookies to provide additional protection from some CSRF vulnerabilities. By default this sets the attribute to Lax. This can be changed by setting the Java system property jenkins.security.JettySameSiteCookieSetup.sameSiteDefault. Users of Microsoft Entra ID (previously Azure AD) Plugin are advised to update the plugin to version 580.v2f665882b_a_71 or newer at the same time. pull 10630, Jenkins features controlled by system properties
  • Use the Jenkins color palette for CodeMirror. pull 10687
  • Allow the Views tab bar to be configured per user. pull 10379
Bug fix
  • Do not close the dropdown menu when hovering over the submenu of the dropdown menu. JENKINS-75635

2.512

May 27, 2025
Enhancement
  • Remove support for ?path and ?pattern query parameters for directory listings of user content, such as workspaces, archived artifacts and others. The filter text box now uses JavaScript instead of a form submission to navigate to the expected URL. Programmatic users are advised to replace ?path or ?pattern in their requests with the resulting redirect URL, whose behavior did not change from before. JENKINS-75388
  • Remove PAM Authentication plugin from suggested plugins. pull 10663
  • Add Powershell script to Windows installer to update registry information after WAR update. Packaging PR 494

2.511

May 20, 2025
Enhancement
  • Remove deprecated hudson.util.IOException2. pull 10628
Major bug fix
  • A change to lazy rendering in 2.510 caused a regression in certain GUI configuration scenarios, such as adding two build steps of the same type, like Execute shell, to a freestyle project at the same time. The workaround is to add one builder, save, reload the page, and then add the next. JENKINS-75664
Bug fix
  • Catch ConnectionRefusalException when thrown by a websocket agent connection attempt. pull 10655

2.510

May 13, 2025
Bug fix
  • Restore the children context menu for breadcrumbs. JENKINS-75634
  • Remove overlapping text from the Thread Dump page. JENKINS-75621
  • Defer rendering a build's artifact list to a background request to avoid expensive computations. pull 10623

2.509

May 6, 2025
Starting with Jenkins 2.509, the default Docker images (2.509, latest, alpine, slim, ...) use Java 21 unless specifically tagged with the jdk17 string. Refer to the Docker 2.509 changelog or pull request for this update for more details.
Major enhancement
  • Display plugin health score from the Plugin Manager. JENKINS-75350
Enhancement
  • New jobs no longer create an empty legacyIds marker file in the builds directory and existing legacyIds files will be deleted upon upgrade to reduce inode usage. JENKINS-75465
  • Jenkins' own user database no longer accepts new passwords longer than supported by bcrypt (72 bytes). Users with longer passwords are advised to change their password. JENKINS-75533
  • Remove jbcrypt library. If you're using Active Directory plugin, make sure to update to version 2.40 at the same time as updating Jenkins. JENKINS-75533
  • Developer: Remove org.connectbot:jbcrypt library from core BOM. JENKINS-75533
Bug fix
  • When completing a build, look for older builds to rotate asynchronously, in case this process is expensive. pull 10555
  • Fix the display of icons in the header by only applying the jenkinsavatar class to user icons, not the other header icons. JENKINS-75615
  • Reduce heap usage of various HTTP endpoints serving large build logs. JENKINS-75081

2.508

April 29, 2025
No notable changes in this release.

2.507

April 22, 2025
Major enhancement
Bug fix
  • Fix "No builds" state remaining in Build History widget after first build. JENKINS-75574
  • Fix state of labels removed from nodes. JENKINS-68155

2.506

April 15, 2025
Enhancement
  • Update test results bar colors to follow the Jenkins design system. pull 10514
  • A new /health endpoint is available to determine whether Jenkins is healthy. JENKINS-75530
  • Developer: Plugins can contribute additional checks for the healthcheck endpoint. JENKINS-75530
Bug fix
  • Ensure computer configuration is updated correctly after updating a node. JENKINS-33704
  • Ensure number of executors of the built-in node is synced with the number of executors defined in Jenkins after a configuration reload. pull 10529
  • Allow icons in tables to be updated even when there is more than one table displayed on the page. pull 10230

2.505

April 8, 2025
Enhancement
  • Refresh user API Token UI. pull 10484
  • Remove support for loading user data from before Jenkins 1.283. JENKINS-75370
  • Remove support for loading proxy configuration from before Jenkins 1.415. JENKINS-75370
  • Add telemetry to determine whether a specific URL (/extensionList/) is in use by plugins or can safely be removed in future releases of Jenkins. pull 10423
  • Add "No plugins" notice to Appearance configuration page. pull 10478
  • Use a dropdown for the Default View of a user. pull 10482
  • Improve UI of Secret and Password entry. pull 10489
  • Standardize widths of Manage Jenkins pages. pull 10479
  • Developer: Deprecate hudson.util.Scrambler. Use java.util.Base64 instead. JENKINS-75370
  • Developer: Describables should directly implement Describable instead of extending AbstractDescribableImpl. pull 10426
Bug fix
  • Fix limitation of Summary widget on the build page. pull 10368
  • Only update affected computers when adding/updating/removing nodes instead of reviewing every computer and checking their retention strategy, which can cause performance issues at scale. JENKINS-33704
  • Fix search result URLs when using the old search implementation. JENKINS-75320
  • Add value attribute to button element in submit.jelly. JENKINS-75441
Changelogs of historical releases can be found in the changelog archive.