PROMETHEUS-3.13.3 release notes and known issues

3.13.3 / 2026-09-07

Scope: Prometheus. This update record adds version, fix and known-issue context. Its publication date is not a lifecycle boundary.

Summary

[SECURITY] Bump github.com/klauspost/compress to v1.18.7 (GO-2026-5841) and golang.org/x/crypto to v0.55.0 (GO-2026-6303). [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

Improvements and security content

[SECURITY] Bump github.com/klauspost/compress to v1.18.7 (GO-2026-5841) and golang.org/x/crypto to v0.55.0 (GO-2026-6303). [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

Known issues

Publisher statement

Not stated. The verified publisher record does not contain a known-issues statement.

Affected products and versions

Products

Prometheus

Affected versions

3.13.3
1.18.7
0.55.0

Fixed versions or updates

No fixed version is stated in this record.

Recommended action

Review the official publisher document before deployment.

Official publisher evidence

PROMETHEUSVERIFIED

3.13.3 / 2026-09-07

Checked 28 Sep 2026. BlackTree preserves the last verified facts if a later source check is temporarily unavailable.

Open the official publisher source