[release] Core stable release 1.15.3 updates (#7125)

Co-authored-by: opentelemetrybot <107717825+opentelemetrybot@users.noreply.github.com>
Co-authored-by: martincostello <martin@martincostello.com>

Author: 3 people

Directory.Packages.props

@@ -2,7 +2,7 @@
 
   <PropertyGroup>
     <ManagePackageVersionsCentrally>true</ManagePackageVersionsCentrally>
-    <OTelLatestStableVer>1.15.2</OTelLatestStableVer>
+    <OTelLatestStableVer>1.15.3</OTelLatestStableVer>
   </PropertyGroup>
 
   <!--

RELEASENOTES.md

@@ -16,7 +16,7 @@ Release details: [1.15.3](https://github.com/open-telemetry/opentelemetry-dotnet
   when `OTEL_DOTNET_EXPERIMENTAL_OTLP_RETRY=disk` is configured.
 * Improve efficiency of parsing of baggage and B3 propagation headers.
 * `OtlpLogExporter` now uses `IHttpClientFactory` on .NET 8+.
-* Fixed an issue in OTLP/gRPC retry handling where parsing gRPC status.
+* Fixed an issue in OTLP/gRPC retry handling when parsing gRPC statuses.
 * Fixed `OTEL_SPAN_ATTRIBUTE_VALUE_LENGTH_LIMIT` not being applied.
 * Fixed baggage and trace headers not respecting the maximum length in some cases.
 * Fixed `BaggagePropagator` to trim optional whitespace (OWS) around `=`

src/OpenTelemetry.Exporter.OpenTelemetryProtocol/CHANGELOG.md

@@ -33,7 +33,7 @@ Released 2026-Apr-21
 
   ([#7106](https://github.com/open-telemetry/opentelemetry-dotnet/pull/7106))
 
-* Fixed an issue in OTLP/gRPC retry handling where parsing gRPC status.
+* Fixed an issue in OTLP/gRPC retry handling when parsing gRPC statuses.
   ([#7064](https://github.com/open-telemetry/opentelemetry-dotnet/pull/7064))
 
 * Fixed an issue with OTLP disk retry storage where metrics and logs used the

src/OpenTelemetry.Exporter.Prometheus.AspNetCore/CHANGELOG.md

@@ -15,6 +15,9 @@ Notes](../../RELEASENOTES.md).
   throwing during scrape rendering.
   ([#7077](https://github.com/open-telemetry/opentelemetry-dotnet/pull/7077))
 
+* Updated OpenTelemetry core component version(s) to `1.15.3`.
+  ([#7125](https://github.com/open-telemetry/opentelemetry-dotnet/pull/7125))
+
 ## 1.15.2-beta.1
 
 Released 2026-Apr-08

src/OpenTelemetry.Exporter.Prometheus.HttpListener/CHANGELOG.md

@@ -15,6 +15,9 @@ Notes](../../RELEASENOTES.md).
   throwing during scrape rendering.
   ([#7077](https://github.com/open-telemetry/opentelemetry-dotnet/pull/7077))
 
+* Updated OpenTelemetry core component version(s) to `1.15.3`.
+  ([#7125](https://github.com/open-telemetry/opentelemetry-dotnet/pull/7125))
+
 ## 1.15.2-beta.1
 
 Released 2026-Apr-08

src/OpenTelemetry.Shims.OpenTracing/CHANGELOG.md

@@ -9,6 +9,9 @@ Notes](../../RELEASENOTES.md).
 * Fixes support for `byte`, `short`, `int`, and `float` attributes.
   ([#7080](https://github.com/open-telemetry/opentelemetry-dotnet/pull/7080))
 
+* Updated OpenTelemetry core component version(s) to `1.15.3`.
+  ([#7125](https://github.com/open-telemetry/opentelemetry-dotnet/pull/7125))
+
 ## 1.15.2-beta.1
 
 Released 2026-Apr-08