Infrastructure

Prometheus 3.13.1 LTS fixes head-chunk cache bug

2026-07-11 digest confirmed

  • Category: Infrastructure
  • Status: confirmed
  • Sources: Prometheus 3.13.1 release
  • Summary: Prometheus 3.13.1, a bugfix release on the 3.13 LTS line published 2026-07-10, fixes a TSDB defect where the head-chunk cache returned samples from the wrong chunk or spurious not-found errors on range queries after head-chunk truncation (#19134).
  • Why it matters: The bug could return incorrect range-query results, so LTS users querying recent data should take the patch.

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