- Add experimental TSDB support for ingesting out‑of‑order samples via a configurable time window.
- Enhance health/readiness endpoints to accept HEAD requests and add meta labels for PuppetDB, AWS EC2, and Lightsail service discovery integrations.
- Fix TSDB memory leak during head compaction, resolve 'invalid magic number' startup error, and close PromQL query file descriptors properly.
2.39.0 / 2022-10-05
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Deprecate non‑true/all values for the stats query parameter on /api/v1/query and /api/v1/query_range, now returning a warning and slated for removal in the next major release.
Updated golang.org/x/text to v0.39.0 and google.golang.org/grpc to v1.82.1, fixing CVE‑2026‑56852 and GHSA‑hrxh‑6v49‑42gf.