What’s fixed in IntelliJ IDEA 2026.3

JetBrains shipped IntelliJ IDEA 2026.3 with over 1,000 bug fixes and over 300 performance fixes, targeting UI freezes, CPU and memory use, and Java and Kotlin code intelligence. The release removes editor stalls from Spring Boot inlay hints, property highlighting and JPA entity analysis, stops Tomcat, WildFly and JBoss from reading configuration files on the UI thread, and makes JaCoCo the default coverage runner for new Java run configurations. IntelliJ IDEA 2026.3 also begins automatically sending error and UI freeze reports to JetBrains, with file paths, URLs and usernames stripped before transmission and an opt-out under Settings | Appearance & Behavior | System Settings | Data Sharing.

IntelliJ IDEA IntelliJ IDEA – the Leading IDE for Professional Development in Java and Kotlin What’s fixed in IntelliJ IDEA 2026.3 Welcome to an overview of the most important fixes and usability improvements in IntelliJ IDEA 2026.3. IntelliJ IDEA 2026.3 ships over 1,000 bug fixes https://youtrack.jetbrains.com/issues?q=Available%20in:%202026.3 %20%23Resolved%20Type:%20%7BBug%7D%20Project:%20IDEA%20Project:%20KTIJ%20Project:%20IJPL%20Project:%20WEB%20Project:%20DBE and over 300 performance fixes https://youtrack.jetbrains.com/issues?q=Available%20in:%202026.3 %20%23Resolved%20Type:%20%7BPerformance%20Problem%7D%20Project:%20IDEA%20Project:%20KTIJ%20Project:%20IJPL%20Project:%20WEB%20Project:%20DBE . We focused on performance, Java and Kotlin code intelligence, and the core workflows that matter for both classic and agentic development. User reports and data shared through automatic submission drive most of this work. Below is a recap of the most impactful updates. Performance Freezes, CPU usage, and memory were the focus of this release. Many of these fixes came from freeze reports and profiling of real projects, and others came from your tickets. Fewer UI freezes We removed UI freezes in the places where they were reported most often. Among others, Spring Boot inlay hints https://youtrack.jetbrains.com/issue/IDEA-392815 , property highlighting https://youtrack.jetbrains.com/issue/IDEA-394712 , and JPA entity analysis https://youtrack.jetbrains.com/issue/IDEA-384840 no longer stall the editor. Tomcat, WildFly, and JBoss no longer read configuration files on the UI thread https://youtrack.jetbrains.com/issue/IDEA-386866 . The same goes for the debugger’s variable building https://youtrack.jetbrains.com/issue/IDEA-388172 , the Git Commit and Changes trees https://youtrack.jetbrains.com/issue/IJPL-252420 , Optimize Imports https://youtrack.jetbrains.com/issue/IJPL-249060 , and Java SDK setup. Indexing, memory, and CPU Indexing is lighter on large projects. We removed excessive index updates when a second project closes during indexing https://youtrack.jetbrains.com/issue/IJPL-2966 and made the workspace model copy files lazily https://youtrack.jetbrains.com/issue/IJPL-242660 . Launching the IDE no longer starts WSL https://youtrack.jetbrains.com/issue/IJPL-172763 when you do not need it. The IDE also uses less memory. A code lens preview no longer keeps HiDPI images alive on the heap https://youtrack.jetbrains.com/issue/IJPL-192327 , and the JPA model no longer creates a new cache key on every lookup https://youtrack.jetbrains.com/issue/IDEA-394487 . Several leaks that kept closed projects in memory are fixed. Project import Importing large Maven and Gradle projects got optimization fixes. A deadlock during import on a remote development host is gone. A five-minute import of the Kotlin repository https://youtrack.jetbrains.com/issue/IDEA-392538 with Gradle 9.7 no longer spends most of its time processing errors after Gradle has finished. Automatic error and freeze reporting To find the problems that interrupt your work and fix them in order of impact, IntelliJ IDEA 2026.3 sends error and UI freeze reports to JetBrains automatically. Reports contain technical data only. File paths, URLs, and usernames are removed before anything leaves your machine. You can turn reporting off in Settings | Appearance & Behavior | System Settings | Data Sharing . Java JaCoCo is now the default coverage runner for new Java run configurations. It is the runner Gradle, Maven, CI systems, and SonarQube already use, so coverage numbers in the IDE match the ones in your pipeline. The Unused declaration inspection now reports methods that are used only from test sources https://youtrack.jetbrains.com/issue/IDEA-183482 . Quick fixes for the “might be null” inspection https://youtrack.jetbrains.com/issue/IDEA-147235 work on complex expressions, Rename stops suggesting the current name https://youtrack.jetbrains.com/issue/IDEA-153400 , and generic stream-to-list conversions https://youtrack.jetbrains.com/issue/IDEA-153641 no longer show a false compilation error. Kotlin A new inspection warns when CancellationException is caught in suspending code and not rethrown https://youtrack.jetbrains.com/issue/KTIJ-14952 , and offers a quick fix. Blocking calls are highlighted in suspend lambdas https://youtrack.jetbrains.com/issue/KTIJ-32716 , and converting Java to Kotlin now turns @lombok.Data classes into data classes https://youtrack.jetbrains.com/issue/KTIJ-12602 . Spring There are hundreds of fixes for different aspects of Spring Framework support: Profiles: Profile switching moved from an editor banner to a status bar widget, and the IDE finds more profiles https://youtrack.jetbrains.com/issue/IDEA-268360 , including test-scope ones. The empty popup https://youtrack.jetbrains.com/issue/IDEA-367835 and the stale widget icon https://youtrack.jetbrains.com/issue/IDEA-394366 are fixed. Configuration properties: Find Usages on a ${…} placeholder first lists the key’s declaration https://youtrack.jetbrains.com/issue/IDEA-390868 and then all its usages. YAML placeholders https://youtrack.jetbrains.com/issue/IDEA-357836 resolve to keys with empty values. Editing config files no longer freezes the IDE. Spring Data: Repository method completion is reworked: inherited methods come first https://youtrack.jetbrains.com/issue/IDEA-390726 , there is no wrong import https://youtrack.jetbrains.com/issue/IDEA-390760 , and Kotlin named queries https://youtrack.jetbrains.com/issue/IDEA-387457 are recognized. Spring Cache: SpEL and meta-annotation handling is more accurate, with no false “missing cache name” warning for meta-annotations https://youtrack.jetbrains.com/issue/IDEA-387522 and Kotlin support in the cacheable components inspection. Spring Modulith: allowedDependencies with String constants https://youtrack.jetbrains.com/issue/IDEA-379856 , additionalPackages https://youtrack.jetbrains.com/issue/IDEA-378404 , and @PackageInfo https://youtrack.jetbrains.com/issue/IDEA-377304 are read correctly, and violations are reported again. Spring Debugger: About 20 fixes, mostly in bean presentation: FactoryBean<T factories https://youtrack.jetbrains.com/issue/IDEA-390167 , init and destroy methods https://youtrack.jetbrains.com/issue/IDEA-390284 , and the security inlay https://youtrack.jetbrains.com/issue/IDEA-391951 . Spring Web: Endpoint detection and URL references improved for Kotlin and Spring Boot 4, including companion-function routes https://youtrack.jetbrains.com/issue/IDEA-383531 and no false nullability warning for JSpecify parameters https://youtrack.jetbrains.com/issue/IDEA-390221 . Spring Core and Spring Boot: 13 fixes, including Spring XML imports without a classpath prefix https://youtrack.jetbrains.com/issue/IDEA-384663 and from modules without the resource on their classpath https://youtrack.jetbrains.com/issue/IDEA-384665 , and import registration navigation for inner classes https://youtrack.jetbrains.com/issue/IDEA-385740 . JPA and Hibernate: About 40 fixes, half of them performance problems. The JPA Console returns correct date values https://youtrack.jetbrains.com/issue/IDEA-393568 , @MapKeyJoinColumn resolves on @ManyToMany https://youtrack.jetbrains.com/issue/IDEA-392277 , and Generate DDL no longer loads forever https://youtrack.jetbrains.com/issue/IDEA-392907 . Flyway and Liquibase: 22 fixes. Flyway Init and Diff https://youtrack.jetbrains.com/issue/IDEA-392935 work again, Liquibase validation errors https://youtrack.jetbrains.com/issue/IDEA-390011 are displayed, and Liquibase XML no longer causes high CPU use https://youtrack.jetbrains.com/issue/IDEA-391907 . JPA Buddy: @OnDelete SQL generation works reliably, and the JPA Designer freeze https://youtrack.jetbrains.com/issue/IDEA-390932 and a slow Map To dialog https://youtrack.jetbrains.com/issue/IDEA-390958 are fixed. Debugger HotSwap The debugger now suggests HotSwap only where it can work. Some edits cannot be reloaded by the JVM, such as changes to a class structure, a method or field signature, or the inheritance. For these Java and Kotlin edits, the IDE offers a restart instead https://youtrack.jetbrains.com/issue/IDEA-390761 . Spring and other scenarios where reloading works differently keep the previous behavior. Virtual threads and tests The thread dump now includes virtual threads https://youtrack.jetbrains.com/issue/IDEA-387873 , mounted and unmounted, in a single dump. You can rerun tests that failed in @BeforeAll https://youtrack.jetbrains.com/issue/IDEA-212278 , and the Stream Debugger shows an inline hint https://youtrack.jetbrains.com/issue/IDEA-388450 when the debugger pauses at a stream chain. Debugging in WSL Debugging in WSL is more reliable. The debugger no longer blocks the application in WSL2 mirrored network mode https://youtrack.jetbrains.com/issue/IDEA-355585 , gets stuck while attaching https://youtrack.jetbrains.com/issue/IDEA-390446 , or disconnects after the first breakpoint https://youtrack.jetbrains.com/issue/IDEA-391260 . Gradle tests in WSL also no longer hang https://youtrack.jetbrains.com/issue/IDEA-370640 . Build tools Maven and Gradle got many fixes. The most voted topic is Maven delegation. With Delegate IDE build/run action to Maven enabled, every build, rebuild, and compile ran mvn install https://youtrack.jetbrains.com/issue/IDEA-198358 , which is usually not the desired behavior. And the presentation of the output was not the same as with the IntelliJ IDEA runner. We fixed both, and delegated builds now run the process-test-classes phase by default. Running main from the gutter now works with Gradle 9.7 Isolated Projects https://youtrack.jetbrains.com/issue/IDEA-392539 . Scala Scala 3 and Twirl The Scala plugin now supports Scala 3.10 http://LINK . Scala 3 code analysis is more accurate, with fewer false errors around overloaded extension methods and inferred collection types. Completion also distinguishes extension methods more clearly and shows fewer duplicate suggestions. We’ve rewritten Twirl support http://LINK for Play Framework to make editing and refactoring templates more reliable. Parsing, completion, formatting, and Find Usages have all improved, and template renaming updates references more consistently. sbt sbt 2.x projects import more reliably http://LINK , while build scripts show fewer false errors around .value and / expressions. We’ve also addressed slow imports with Scala 3.8 http://LINK and a BSP import performance regression http://LINK . Debugger Debugger fixes remove interruptions caused by UI freezes http://LINK during expression completion and watch evaluation. Breakpoints now stop execution as expected in Future callbacks and for comprehensions http://LINK inside Scala 3 top-level methods. Compiler-based highlighting Compiler-based highlighting http://LINK now uses fewer resources by reusing diagnostics, combining file checks, and avoiding unnecessary compilation retries. BSP checks and diagnostics after edits or cancellation are more reliable, and the editor explains blocked highlighting with links to the errors responsible. Further fixes span Scala CLI scripts and shebang syntax, dependency completion, formatting and Scalafmt integration, and incremental compilation after macro changes. You can read more in this article http://LINK . Markdown Markdown received more fixes than almost any other area, so editing specifications and documentation is smoother. Absolute path links https://youtrack.jetbrains.com/issue/IJPL-92231 in the preview open the file, and a new setting, Strip trailing spaces in Markdown files on save , keeps whitespace out of your documents https://youtrack.jetbrains.com/issue/IJPL-92308 . GitHub wiki links https://youtrack.jetbrains.com/issue/IJPL-91123 and images embedded as base64 https://youtrack.jetbrains.com/issue/IJPL-94682 work in the preview. Breadcrumbs https://youtrack.jetbrains.com/issue/IJPL-91056 show the heading path, and you can exclude headings from a generated table of contents https://youtrack.jetbrains.com/issue/IJPL-177429 . Terminal The terminal got the ghostty https://blog.jetbrains.com/platform/2026/10/jetbrains-terminal-now-uses-ghostty/ emulator, and over 40 fixes https://youtrack.jetbrains.com/issues?q=Subsystem:%20%7BTools.%20Terminal%7D%20Available%20in:%202026.3%20%23Resolved on top of it. Among others, working with tabs was reworked, multiline URLs and file paths are handled better and more reliably. User interface New Plugin management UI We’ve merged the Installed and Marketplace tabs https://youtrack.jetbrains.com/issue/IJPL-248768/Combine-Installed-and-Marketplace-tabs-in-Plugins into a single view, so one search box now finds plugins whether they’re already installed, bundled with the IDE, or available on JetBrains Marketplace. Results are grouped into clear Installed, Bundled, and Suggested sections that you can expand as needed, so you no longer have to switch tabs to find what you’re looking for. The Plugins page also opens in its own window, which leaves more room for plugin descriptions, screenshots, and release notes. Simple on/off toggles and a less crowded layout give it a cleaner look. Vertical tool window names and new layouts The newly released Extended Tool Windows UI https://plugins.jetbrains.com/plugin/34198-extended-tool-windows-ui plugin adds vertical names beside tool window icons, keeping labels visible without taking extra width from the editor. You can also arrange tool window buttons in horizontal rows along the top or bottom edge and anchor tool windows in the upper-left or upper-right corners. Reorder status bar widgets Status bar widgets https://youtrack.jetbrains.com/issue/IJPL-43620 are now movable, and indentation settings, memory indicator, or inspection widget can sit where you look first. Drag widgets into your preferred order and hide the ones you don’t need. The IDE saves your layout between sessions. Git Git worktrees Git worktrees are the most requested fix of this release. Worktrees now work in multi-root projects https://youtrack.jetbrains.com/issue/IJPL-239027 , and you can also open a merge request in a separate worktree https://youtrack.jetbrains.com/issue/IJPL-252785 . Stash and remote development You can include untracked and ignored files when you stash https://youtrack.jetbrains.com/issue/IJPL-76149 . In remote development, Open Diff as Editor Tab https://youtrack.jetbrains.com/issue/IJPL-165702 now behaves as it does in a local IDE. GitLab connections with OAuth Connect your GitLab account to your JetBrains IDE by signing in through your browser, without creating and pasting a personal access token. OAuth works with GitLab.com and custom GitLab instances, and you can use the connected account for merge requests and Git operations over HTTPS. Git SHA-256 repositories JetBrains IDEs now handle the 64-character object IDs used in Git SHA-256 repositories. The fixes cover Git Log filtering and navigation, file history, interactive rebase, and commit-editing actions. Other improvements SSH JetBrains IDEs now use OpenSSH for SSH connections. This adds support for certificate-based authentication, hardware security tokens such as YubiKey, Kerberos SSPI, X11 forwarding, and ProxyJump, along with a broader range of SSH agents and wrappers. Remote JSON schemas now download without a VFS error https://youtrack.jetbrains.com/issue/IJPL-173495 . MCP server port is configurable https://youtrack.jetbrains.com/issue/IJPL-207839 in settings. That’s it That’s it for this overview. Let us know which fixes matter most to you and where you still see friction. Update to IntelliJ IDEA 2026.3 and share your favorite updates with us on X, Bluesky, or LinkedIn. Thank you for using IntelliJ IDEA Prev post Where Did the Saved Bytes Go? 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