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OpenTelemetry Changelog

This site tracks pull requests to the OpenTelemetry Specification, Semantic Conventions, and Proto Definitions. The following items are tracked:

  • Non-trivial specification changes and releases.
  • New semantic convention areas or stability changes, as well as releases.
  • Updates and releases of the protos.

The goal of this site is to give maintainers a single reference for important cross-functional changes.

To add a Pull Request to this feed, label it with changelog.opentelemetry.io

v1.40.0

🛑 Breaking changes 🛑

2/19/2026open-telemetry/semantic-conventionsreleasedBy @jsuereth

Release 1.54.0

Context

  • Deprecate Jaeger propagator and make propagator implementation optional.
2/13/2026open-telemetry/opentelemetry-specificationreleasedBy @carlosalberto

Introduce vulnerability component

Introduce a new security namespace Vulnerability.

Fields are taken from ECS Vulnerability namespace

2/9/2026open-telemetry/semantic-conventionsclosedBy @trisch-me

2026.01

What's Changed

  • Refresh refcache by @otelbot-docs[bot] in https://github.com/open-telemetry/opentelemetry.io/pull/8728
  • Add ducklake collector exporter to the registry by @hrl20 in https://github.com/open-telemetry/opentelemetry.io/pull/8732
1/31/2026open-telemetry/opentelemetry.ioreleasedBy @theletterf

v1.39.0

🛑 Breaking changes 🛑

1/12/2026open-telemetry/semantic-conventionsreleasedBy @jsuereth

v1.53.0

What's Changed

Metrics

1/9/2026open-telemetry/opentelemetry-specificationreleasedBy @lmolkova

Refine recording errors documentation to include logs and avoid span events

Towards OTEP: Span Event API deprecation plan

Towards https://github.com/open-telemetry/opentelemetry-specification/issues/4429

1/7/2026open-telemetry/semantic-conventionsclosedBy @pellared

Stabilize complex AnyValue types and related attribute limits

Fixes #4710

OTEP #4485 (Extending attributes to support complex values)

1/7/2026open-telemetry/opentelemetry-specificationmergedBy @pellared

2025.12

What's Changed

  • Refresh refcache by @otelbot-docs[bot] in https://github.com/open-telemetry/opentelemetry.io/pull/8546
  • Clarify how to visualize traces on Jaeger by @network-charles in https://github.com/open-telemetry/opentelemetry.io/pull/8316
12/30/2025open-telemetry/opentelemetry.ioreleasedBy @theletterf

Release 1.52.0

Context

  • Make the W3C randomness flag required.
12/12/2025open-telemetry/opentelemetry-specificationreleasedBy @carlosalberto
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