TeamCity 2026.2.1 Release Notes

Bug

• TW-103395 — When the pre-existing branch was removed respond with empty yaml

• TW-103737 — Execution timeout should cause retry of a dependency

• TW-103446 — YAML in branches: can't import yaml from the main branch

• TW-104024 — New builds are triggered by +pr:* VCS trigger on closed PRs if PRs on source branches are used and covered by the branchspec

• TW-104290 — TeamCity can skip updating the current project from the versioned settings claiming that the task with the same revision is scheduled

• TW-104098 — Mercurial in pipelines cannot compute revision properly because there are no changes attached to the job

• TW-98285 — "Expand" tooltip blocks the expand sidebar button

• TW-103024 — True-Up license ignores standalone agent licenses when calculating the licensed agent count

• TW-103853 — Make sure on agent DSL execution uses Maven 3.9 and not just a default one

• TW-100772 — DiffView in teamcity UI stopped working on 2026.1 for TFS

• TW-103602 — Improve contrast for Versioned Settings page when it's in read-only mode

• TW-102948 — Pipeline delete button is unavailable if pipeline versioned settings are stored in yaml

• TW-103946 — Not all Log4j appenders are started prior to adding them to the logging setups

• TW-102758 — Param "teamcity.buildQueue.restartBuildAttempts" not respected on virtual builds.

• TW-103813 — "Investigations Auto-Assigner" plugin may assign flaky test for investigation

• TW-94612 — Log in to GitHub button not shown during creation a new pipeline after revoking OAuth token without typing the repository name

• TW-103778 — Avatar upload fails with HTTP 400 after servlet multipart migration

• TW-104025 — Visual Studio Build Tools 2026 September update : MSBuildTools not detected

• TW-100753 — Heartbeat thread can't recover after DB communication failure

• TW-100466 — Unexpected skipping of dependency builds in TeamCity build chains (skipQueuedBuild service message)

• TW-102376 — YAML in branches: Branch selection dialog looses branch name when typed too fast

• TW-103535 — YAML in branches: improve error dialogue in case the commit failed

• TW-103537 — YAML in branches: Wrong color of the branch icon on hover in error state

• TW-101975 — Pipelines: numeric runner fields fail to render — "No applicable renderer found" (e.g. SSH Upload: Port, Timeout)

Performance Problem

• TW-103895 — FakeHttpSession objects leak in case of continuous authentication with help of Basic auth and auth token as a password

• TW-104021 — Limit the number of changes processed by a VCS trigger for a newly detected branch

Security

41 security problems have been fixed. To learn more about fixed vulnerabilities directly related to TeamCity, check out our Security Bulletin.

Security bulletins are typically published few days after the release date.