Jenkins Changelog

Jenkins 2.554

Sat, 7 Mar 2026 00:00:00 +0000

RFE: Adapt Script Console for experimental Manage Jenkins UI
RFE: Refine legacy Add button for repeatable lists
Bug: Fix keyboard navigation scrolling in dropdowns
Bug: Partially revert optimisation in RunMap that causes issues when reloading

Jenkins 2.553

Mon, 2 Mar 2026 00:00:00 +0000

Bug: Restore unsaved changes warning in the new Manage Jenkins UI.

Jenkins 2.552

Tue, 24 Feb 2026 00:00:00 +0000

RFE: Update Jenkins CLI's subpages to use experimental Manage Jenkins UI
RFE: Revamp Clouds page
RFE: Add experimental Plugin Manager UI
Bug: Fix estimated build number in Build History widget
Bug: Redirect to the correct URL when creating log recorders with nonASCII names.
Bug: Do not fail builds when the tool installation directory is readonly.
Bug: Don't validate input fields when they are disabled
Bug: Fix link to polling log of upstream build caused by an SCM trigger after a Jenkins restart
Bug: Prevent afterDisconnect() from being called twice when an agent disconnects
Bug: Add support for combobox and autocomplete in dialogs

Jenkins 2.551

Wed, 18 Feb 2026 00:00:00 +0000

Security: Important security fixes.

Jenkins 2.550

Mon, 9 Feb 2026 00:00:00 +0000

RFE: Refine dialog component
RFE: Refine the 'New Item' screen
RFE: Automatically hide last repeatable delete button with minimum > 0
RFE: Make time zone list expandable in help.
Bug: Fix progressive rendering progress calculation
Bug: Avoid that when copying a cloud anything else than the name is changed
Bug: Make redirects to documentation on www.jenkins.io work in the builtin administrative monitors when using Chrome and enforcing Content Security Policy.
Bug: Do not compute the CSP header if it's completely disabled using the Java system property jenkins.security.csp.CspHeader.headerName in case computation takes too long.

Jenkins 2.549

Sun, 1 Feb 2026 00:00:00 +0000

RFE: Add telemetry for password field masking.
RFE: Clarify UI label when configuring Content Security Policy.
RFE: Minor refinement of dropdowns and empty states.
Bug: Fix shutdown banner visibility on Plugin Manager pages when preparing for shutdown
Bug: Fix a 404 error when clicking plugin names on the “License and dependency information for plugins” page.
Bug: Fix exception message being logged in rare cases on views with keyboard shortcut indicators.
Bug: Fix primary button text color in administrative monitors.

Jenkins 2.548

Sun, 25 Jan 2026 00:00:00 +0000

Major Bug: Submitting a form would in rare cases, lead to an error (Got type array but no lister class found for type...)
RFE: Add online help for the “Remove last build” build discarder option.
RFE: API tokens with expiration date
Bug: Fix temporary offline state of computer is lost on config submit
Bug: Fix sidebar navigation for nonASCII localized section headers.

Jenkins 2.547

Mon, 19 Jan 2026 00:00:00 +0000

RFE: * Use display name in directory browser breadcrumb.
Bug: Fix false "Build Scheduled" notification when attempting to build branch jobs in disabled multibranch projects
Bug: Hide build buttons in Multibranch branch/PR jobs when the Multibranch or organization folder is disabled
Bug: Fix cloud URL when using experimental settings redesign

Jenkins 2.546

Mon, 12 Jan 2026 00:00:00 +0000

Bug: Fix category headers showing as raw HTML on New Item page.

Jenkins 2.545

Mon, 5 Jan 2026 00:00:00 +0000

Major RFE: Require Java 21 or newer.
RFE: Add telemetry for Java properties.
RFE: Bump the minimum supported remoting.jar version to 3176.v207ec082a_8c0
Bug: Prevent race condition during initial administrator account creation.
Bug: Avoid NPE in Job#getLastBuildsOverThreshold
Bug: Use rootURL in Cloud sidepanel so links in actions work properly.

Jenkins 2.544

Mon, 29 Dec 2025 00:00:00 +0000

RFE: Add Java 25 container images.
Bug: * Display a brief message on update site signature verification failure instead of showing a stack trace.

Jenkins 2.543

Tue, 23 Dec 2025 00:00:00 +0000

RFE: No longer include the client IP address in CSRF protection token ("crumb") calculation. Effectively, the behavior is the same as if the (now removed) "Enable proxy compatibility" option were always checked.
RFE: Show a warning to administrators who set the hudson.security.csrf.DefaultCrumbIssuer.EXCLUDE_SESSION_ID flag, informing them of the further reduced safety, and the option's planned future removal.
Bug: Fix console log copy button for freestyle projects that have finished (regression in 2.493).
Bug: Allow large forms to be submitted (regression in 2.531).

Jenkins 2.542

Mon, 15 Dec 2025 00:00:00 +0000

RFE: Add telemetry for Content Security Policy enforcement.
RFE: Enables the Overall/Manage permission by default. This permission when granted to users allows them to configure certain parts of Jenkins' global configuration without the ability to execute arbitrary code.
RFE: Truncate verbose queue blockage messages to show maximum 5 reasons with "... and N more" suffix.
RFE: Allow entirely disabling CSP headers to work around unusual Jenkins configurations resulting in excessive HTTP response header lengths.
RFE: Update Winstone to version 8.1026.v31def012a_f48 to increase the default maximum HTTP response header size to 32KB to account for very complex Content Security Policy headers.
Bug: Fix NullPointerException in "ReverseBuildTrigger" when configuration has a missing threshold.

Jenkins 2.541

Wed, 10 Dec 2025 00:00:00 +0000

Security: Important security fixes.

Jenkins 2.540

Tue, 2 Dec 2025 00:00:00 +0000

RFE: Ignore casing in AvatarContributor#extractDomainFromUrl.
Bug: Show saved log recorders again (regression in 2.537).
Bug: Fix incorrect handling of Content Security Policy inheritance chain for fetch directives. This could affect attempts to set *srcelemor *srcattr directives in CSP Plugin 2.x.
Bug: Make "Change API Token" for legacy API tokens work when Content Security Policy is enforced and prohibits inline JavaScript.
RFE: Add X-Jenkins-ValidateButton-Callback (a JSON object with callback and arguments keys) as a replacement for the CSP incompatible script HTTP response header for f:validateButton.

Jenkins 2.539

Tue, 25 Nov 2025 00:00:00 +0000

Major RFE: Allow configuring Content-Security-Policy protection for the Jenkins UI. Introduce an API for plugins to relax (or further tighten) the rules around various resources. If you have the Content Security Policy Plugin (csp) installed, update it to version 2.x.
RFE: Add rest API to create an agent from XML.
Bug: Fix API token rendering.
Bug: Fix overlap text when viewing builds for jobs with long names.

Jenkins 2.538

Tue, 18 Nov 2025 00:00:00 +0000

Major Bug: Allow SSH build agents to connect.

Jenkins 2.537

Tue, 18 Nov 2025 00:00:00 +0000

RFE: Add experimental Manage Jenkins layout.
RFE: Performance improvement for queue item scheduling.
RFE: Remove some very old extension list behaviors.
RFE: Refine changes for the experimental Run UI.
Major RFE: Red Hat and openSUSE packages are unified into the same RPM packaging with a brand new URL: https://pkg.jenkins.io/rpm/. System V initialization scripts are removed for openSUSE installations

Jenkins 2.536

Tue, 11 Nov 2025 00:00:00 +0000

RFE: Redesign the reorderable list component.
RFE: Log a thread dump when a /health check exceeds the 10 second default timeout to help diagnose stuck requests. This timeout is configurable via the jenkins.health.HealthCheckAction.thresholdTimeout system property.
RFE: Use the same styling for title bar mouseover effect.
Bug: Revert display:flex addition from the default panel-header CSS.
Bug: Set the default enter delay for tooltips to 250ms.
Bug: Fix the ordering of the experimental Run UI tabs.
Bug: Restore file fingerprint and project relationship actions to views.

Jenkins 2.535

Tue, 4 Nov 2025 00:00:00 +0000

RFE: Refine badges.
RFE: Add ability to set default value for experimental flags via system property.
RFE: Remove duplicate built-in executor configuration from System configuration page. It now configures it on the built-in executor under Nodes instead.
Bug: Ignore NoSuchFileException in FilePath#unzip.
Bug: Eliminate spurious CPU utilization in browser when idle.
Bug: CasC items.yaml now loads after the SYSTEM_CONFIG_ADAPTED milestone is completed.
Bug: Fix toggle collapse in Chrome to prevent 404 errors.
Bug: Fix MyViewsProperty condition.

Jenkins 2.534

Tue, 28 Oct 2025 00:00:00 +0000

Major RFE: Support Java 25.
RFE: Add experimental dashboard UI.
RFE: Stream HTML console log.
RFE: Add method variants for more convenient use with lambdas.
RFE: Support images in card teasers.

Jenkins 2.533

Tue, 21 Oct 2025 00:00:00 +0000

RFE: Refine cards UI.
RFE: Add experimental job page UI.
Bug: 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.
RFE: Deprecating the Extension.optional attribute.

Jenkins 2.532

Tue, 14 Oct 2025 00:00:00 +0000

RFE: Change required input validator to reject strings that are only whitespace.
RFE: Add support for tabs on the experimental run page.
RFE: Remove deprecated and unused FormFieldValidator.NonNegativeInteger.
RFE: Add German localization for proxy configuration.
RFE: Add interface based constructor for AnnotatedLargeText.

Jenkins 2.531

Tue, 7 Oct 2025 00:00:00 +0000

RFE: Add health check for failure to bind an enforced TCP agent port.
RFE: Show build cause on experimental build UI.
RFE: Move experimental run sidepanel to overflow menu.

Jenkins 2.530

Tue, 30 Sep 2025 00:00:00 +0000

RFE: Add experimental Parameters dialog for builds.
RFE: Refine experimental run details interface.
RFE: Removed configureclouds redirect to clouds.
Bug: Ensure file parameters are retained across Jenkins restarts.
Bug: Streamline logic to disconnect agents during controller shutdown.

Jenkins 2.529

Mon, 22 Sep 2025 00:00:00 +0000

RFE: Optimize build lazy loading during iteration via RunMap.entrySet() and RunMap.keySet().
RFE: Optimize LogRotator build iteration using RunMap.entrySet().
RFE: Move the user time zone configuration to the user preferences page.
RFE: Improve the display of help text for agent launch methods.
Bug: Fix "All/None/Suggested" buttons visibility in plugin setup wizard.
Bug: Try harder to release controller memory after using some JavaScript features.
Bug: Fix number comparison in min/max form validator.

Jenkins 2.528

Wed, 17 Sep 2025 00:00:00 +0000

Security: Security fixes.

Jenkins 2.527

Tue, 9 Sep 2025 00:00:00 +0000

Bug: Fix a race condition in WebSocket agent connection initialization.

Jenkins 2.526

Tue, 2 Sep 2025 00:00:00 +0000

RFE: Improve UberClassLoader class caching.
RFE: Expose NavigableMap interface from the CopyOnWrite.Tree map. Optimise the AbstractLazyLoadRunMap.search() method.
RFE: Add Polish translations.

Jenkins 2.525

Tue, 26 Aug 2025 00:00:00 +0000

RFE: Refactor BuildReferenceMapAdapter to improve code re-usage.