Infrastructure

Prometheus 3.13.1 fixes a TSDB range-query correctness bug

2026-07-10 digest confirmed

  • Category: Infrastructure
  • Status: confirmed
  • Sources: Prometheus 3.13.1 release
  • Summary: Prometheus released 3.13.1 on 2026-07-10, a bugfix release for the 3.13 LTS line. It fixes a TSDB defect where the head-chunk cache could return samples from the wrong chunk, or spurious not-found errors, on range queries after a head-chunk truncation.
  • Why it matters: The bug produced incorrect or missing range-query results in a widely deployed monitoring system. Operators running the 3.13 LTS line should upgrade to keep query results correct.

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