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Prometheus

v3.13.3Observability
Sep 7, 2026

ACTION 1OTHER 7

A maintenance release with security-related dependency updates and correctness fixes across shutdown handling, query matching, service discovery, and TSDB reliability. No configuration or default changes are stated.

Action needed (1)

  • securityhighSecurity updates for github.com/klauspost/compress and golang.org/x/crypto

    The release updates github.com/klauspost/compress to v1.18.7 for GO-2026-5841 and golang.org/x/crypto to v0.55.0 for GO-2026-6303.

All 7 other recorded changesfixes 7

fixes (7)

  • - [BUGFIX] Docker SD: Fix panic in Docker Swarm service discovery when a service runs as a plugin or network-attachment. #19102
  • - [BUGFIX] PromQL: Fix case-insensitive regex label matchers silently dropping matching values. #19167
  • - [BUGFIX] Scrape: Fix scrape manager spinning at 100% CPU on shutdown. #19149
  • - [BUGFIX] Alerting: Fix 100% CPU usage on shutdown that could delay graceful shutdown and trigger timeout-based kills. #17859
  • - [BUGFIX] TSDB: Fix out-of-order queries blocking compaction for hours, causing memory usage to grow. #19013
  • - [BUGFIX] TSDB: Fix deleted series causing missing samples and errors after restart. #19140
  • - [BUGFIX] TSDB: Fix goroutine and file handle leaks when Prometheus fails to open a corrupt TSDB. On Windows, the leaked directory handle also prevented TSDB directory removal. #18291
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