Prometheus v3.11.1 released on 07-04-2026
Prometheus v3.11.1 is out now. Systems using OTLP HTTP tracing with insecure: true should no longer fail to start.
See the release on GitHub for full details: https://api.github.com/repos/prometheus/prometheus/releases/latest
What’s in this release
- Fixes a startup crash when using OpenTelemetry Protocol (OTLP) over HTTP with tracing configured and the option insecure: true (bugfix #18469).
- Upgrade guidance: users running OTLP HTTP tracing with insecure: true should move to v3.11.1 to avoid the startup failure.
- Recommended actions: plan a quick rollout for affected instances, verify tracing initialisation after upgrade, and review tracing TLS settings — prefer enabling TLS where possible.
Upgrade notes
- No breaking changes reported; affected setups using OTLP HTTP tracing with insecure: true should upgrade to v3.11.1 to prevent the startup crash.
- The update is focused and low-risk; follow your normal upgrade and rollback procedures and verify tracing initialisation after the update.
Share any comments on your experience upgrading or report if you still see the startup failure.
