OpenTelemetry Changelog

v1.10.0

What's Changed

Added

3/9/2026open-telemetry/opentelemetry-protoreleasedBy @jsuereth

Release 1.55.0

Traces

Add normative language to the Tracing API/SDK spec concurrency requirements.

3/5/2026open-telemetry/opentelemetry-specificationreleasedBy @jack-berg

2026.02

What's Changed

Auto-update registry versions (de3c98bbb20d08483760e6b4cf4e32904120caa2) by @otelbot[bot] in https://github.com/open-telemetry/opentelemetry.io/pull/9084
[zh] Add handling-sensitive-data.md by @windsonsea in https://github.com/open-telemetry/opentelemetry.io/pull/8715

2/28/2026open-telemetry/opentelemetry.ioreleasedBy @theletterf

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