Loki v3.7.3 released on 24-06-2026
Loki v3.7.3 is out now. Operators and OpenShift users should note a breaking change: the Loki operator switches the default for OpenShift stream labels, which can alter how streams are labelled by default.
See the Loki GitHub release notes for full details, upgrade guidance and the complete list of fixes and improvements.
What’s in this release
- Operator changes: switch of the OpenShift stream-label default (breaking change), customizable gateway server certificates, removal of kube-rbac-proxy from metrics auth, Loki operand bump, improved networkpolicy handling and fixes to OLM bundle image references.
- Query engine and LogQL: bloom filter to cache known streams, frontend cache refactor with metrics and cached-stream filtering, results cache for the thor engine, option to disable cache for query_range, case-insensitive regex and SubstringInsensitive optimisations, plus multiple correctness and performance fixes.
- Ingestion and storage lifecycle: builder pool for logs objects, a flush manager for data-object lifecycle, batching and rate-batcher improvements, kafkav2 GroupConsumer and safer consumer shutdown, planner for dataobj compaction and stream-sharding changes.
Upgrade notes
- Breaking change: the operator now switches the default for OpenShift stream labels — operators and OpenShift users must review stream-label defaults and operator configuration before upgrading; consult the GitHub release notes and operator docs.
- Build and dependency updates include a move to Go 1.26 and numerous dependency bumps and security fixes; review the dependency and security notes and test upgrades in staging.
Share comments on your upgrade experience or issues on the Loki GitHub issues page so others can learn from any problems or workarounds you find.
