Prometheus v3.13.1 released on 10-07-2026
Prometheus v3.13.1 is out now. It is a 3.13 LTS bugfix release that corrects a TSDB head-chunk cache bug which could return samples from the wrong chunk or report spurious not-found errors to range queries after head-chunk truncation.
See the release on GitHub for full notes and downloads: https://api.github.com/repos/prometheus/prometheus/releases/latest
What’s in this release
- BUGFIX: TSDB head-chunk cache fix that prevents returning samples from the wrong chunk or spurious not-found errors to range queries after head-chunk truncation (issue #19134).
- Released as a targeted 3.13 LTS bugfix — no feature changes in this update.
- Recommended for all users on the 3.13 LTS branch, especially deployments with frequent head-chunk rotation/compaction or those seeing intermittent missing or incorrect recent-range query results.
Upgrade notes
- No breaking changes or deprecations are indicated; this is a targeted correctness fix for the TSDB head-chunk cache.
- Suitable for rolling upgrades — restart Prometheus nodes to pick up the fix.
Share your experience after upgrading, especially if you were seeing intermittent missing or incorrect recent-range query results.
