TeamCity 2026.1.2 Release Notes
Build 222647, 1 July 2026
Bug
TW-101333 — Comparison method violates its general contract! in BuildPromotionProblems.getBuildProblemsFromDB
TW-101373 — Slash ("/") in S3 path prefix leads to signature mismatch
TW-100758 — Credentials provided via provideAwsCredentials appear to expire sooner than sessionDuration after upgrade to 2026.1
TW-79701 — Build hangs without any message ("InvalidRunningBuildException: Unauthorized access to build with id" in the agent log)
TW-99693 — Broken build if reusing a pipeline with failed jobs in a build chain
TW-97638 — Stop build command from the server may cancel the step set to be always executed
TW-100860 — Personal builds fail during agent-side checkout when unshelving a Perforce changelist that contains files opened exclusively
TW-100745 — Cloud Image can't be moved to a pool not containing the project that contains this image.
TW-101089 — Lots of duplicate entry errors on attempt to store a metric id to the dictionary table
TW-99340 — Messages "Agent will upgrade" and "Agent can't be upgraded automatically" can be shown at the same time
Performance Problem
TW-100647 — Server cleanup duration ~3x regression on SQL Server after 2025.11.3 upgrade
Security
Two 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.