- Updated Prometheus to build with Go 1.16, improve RSS memory metrics, and switch default Alertmanager to v2 API.
- Added new features: AWS SigV4 auth for remote write, Scaleway service discovery, negative PromQL offsets, in‑memory exemplar storage, UI autocomplete/linting, and new PromQL functions (last_over_time, sgn, clamp).
- Included multiple enhancements (custom remote read headers, follow‑redirects for scrape, UI query trigger on Enter, collapse/expand on targets) and bug fixes such as TSDB eager block deletion and parser handling of special characters.
2.26.0 / 2021-03-31
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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.