TeamCity 2026.1.5 Release Notes

Bug

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

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

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

• TW-90062 — No way to create an S3 Storage if user doesn't have permission to us-east-1 region

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

27 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.