Prometheus v3.11.1 released on 07-04-2026
Prometheus v3.11.1 is out now. It fixes a startup crash affecting instances configured to use OTLP-over-HTTP tracing with insecure: true, which could prevent Prometheus from starting.
Read the release on GitHub for full details and to download the fixed binary or container image: https://api.github.com/repos/prometheus/prometheus/releases/latest
What’s in this release
- Bugfix: startup failure for OTLP-over-HTTP tracing when insecure: true (see issue/PR #18469).
- Affects configurations using OTLP HTTP tracing with TLS validation disabled; the failure could stop Prometheus from starting.
- Release recorded 2026-04-07 15:53:04 (Europe/London); release notes list a single targeted bugfix.
Upgrade notes
- If you use OTLP-over-HTTP tracing (particularly with insecure: true) upgrade to v3.11.1 to avoid the startup failure — validate the upgrade in staging and restart Prometheus after replacing the binary or container image.
- If you need to roll back, redeploy the previous Prometheus binary or container image and report any issues via the project’s GitHub (refer to issue/PR #18469 where relevant).
Share your experience upgrading Prometheus or any problems you encounter on the project’s GitHub or in the issue tracker.
