Bazel 9 LTS

We’re pleased to announce the release of Bazel 9.0! This LTS release is the culmination of some multi-year efforts to lay the groundwork for a healthier Bazel ecosystem, and we’re excited to see these efforts finally land. Read the full release notes for Bazel 9.0.

Postmortem for *.bazel.build SSL certificate expiry

On 2025-12-26, at 07:35 UTC, the SSL certificates for many *.bazel.build domains expired. This resulted in widespread build breakages for many Bazel users, as several crucial domains serve essential functionality used by nearly all Bazel builds. It was reported by users on GitHub, Slack, and the bazel-discuss mailing list. The outage lasted for approximately 13 hours before being resolved.