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Oct 26, 2025
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Prepare v1.5.55 release #7926

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20 changes: 12 additions & 8 deletions Directory.Build.props
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<PropertyGroup>
<Copyright>Copyright © 2013-$([System.DateTime]::Now.Year) Akka.NET Team</Copyright>
<Authors>Akka.NET Team</Authors>
<VersionPrefix>1.5.54</VersionPrefix>
<VersionPrefix>1.5.55</VersionPrefix>
<PackageIcon>akkalogo.png</PackageIcon>
<PackageProjectUrl>https://getakka.net/</PackageProjectUrl>
<PackageLicenseExpression>Apache-2.0</PackageLicenseExpression>
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<CopyLocalLockFileAssemblies>true</CopyLocalLockFileAssemblies>
</PropertyGroup>
<PropertyGroup>
<PackageReleaseNotes>Akka.NET v1.5.54 is a patch release containing important bug fixes for Akka.Streams and Akka.DistributedData.
<PackageReleaseNotes>Akka.NET v1.5.55 is a patch release containing important stability and security improvements for Akka.Remote.

**Bug Fixes:**
**Akka.Remote Stability Improvements:**

* [Fix SourceRef.Source and SinkRef.Sink non-idempotent property bug](https://github.com/akkadotnet/akka.net/pull/7907) - Fixes [issue #7895](https://github.com/akkadotnet/akka.net/issues/7895) where `ISourceRef&lt;T&gt;.Source` and `ISinkRef&lt;T&gt;.Sink` properties created new stage instances on every access, causing race conditions and intermittent subscription timeouts. These properties are now idempotent using `Lazy&lt;T&gt;`, preventing failures from accidental property access (debugger inspection, logging, serialization frameworks).
* [Akka.Remote: harden EndpointWriter against serialization failures](https://github.com/akkadotnet/akka.net/pull/7925) - Fixes [issue #7922](https://github.com/akkadotnet/akka.net/issues/7922) by hardening the `EndpointWriter` against a broader range of potential serialization failures, improving overall remoting stability.

* [Fix LWWDictionary.Delta ArgumentNullException when underlying delta is null](https://github.com/akkadotnet/akka.net/pull/7912) - Fixes [issue #7910](https://github.com/akkadotnet/akka.net/issues/7910) where `LWWDictionary.Delta` would throw `ArgumentNullException` when the underlying `ORDictionary.Delta` was `null`, which is a legitimate state after initialization or calling `ResetDelta()`.
**Akka.Remote Security Improvements:**

1 contributor since release 1.5.53
* [Custom certificate validation with single execution path - fixes mTLS asymmetry bug](https://github.com/akkadotnet/akka.net/pull/7921) - Fixes [issue #7914](https://github.com/akkadotnet/akka.net/issues/7914) by introducing programmatic certificate validation helpers through the new `CertificateValidation` factory class. This release adds 7 new validation helper methods including `ValidateChain()`, `ValidateHostname()`, `PinnedCertificate()`, `ValidateSubject()`, `ValidateIssuer()`, `Combine()`, and `ChainPlusThen()`. The update also fixes an mTLS asymmetry bug where server-side hostname validation was not being applied consistently with client-side validation, all while maintaining full backward compatibility with existing HOCON-based validation.

* [Fix DotNettySslSetup being ignored when HOCON has valid SSL config](https://github.com/akkadotnet/akka.net/pull/7919) - Fixes [issue #7917](https://github.com/akkadotnet/akka.net/issues/7917) where programmatic `DotNettySslSetup` settings were incorrectly being overridden by HOCON configuration. Programmatic configuration now correctly takes precedence over HOCON defaults as intended.

1 contributor since release 1.5.54

| COMMITS | LOC+ | LOC- | AUTHOR |
| --- | --- | --- | --- |
| 2 | 159 | 20 | Aaron Stannard |
| 3 | 1605 | 289 | Aaron Stannard |


To [see the full set of changes in Akka.NET v1.5.54, click here](https://github.com/akkadotnet/akka.net/milestone/137?closed=1)</PackageReleaseNotes>
To [see the full set of changes in Akka.NET v1.5.55, click here](https://github.com/akkadotnet/akka.net/milestone/138?closed=1)</PackageReleaseNotes>
</PropertyGroup>
<ItemGroup Label="Analyzers" Condition="'$(MSBuildProjectName)' != 'Akka'">
<PackageReference Include="Akka.Analyzers" Version="$(AkkaAnalyzerVersion)" PrivateAssets="all" />
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23 changes: 23 additions & 0 deletions RELEASE_NOTES.md
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#### 1.5.55 October 26th, 2025 ####

Akka.NET v1.5.55 is a patch release containing important stability and security improvements for Akka.Remote.

**Akka.Remote Stability Improvements:**

* [Akka.Remote: harden EndpointWriter against serialization failures](https://github.com/akkadotnet/akka.net/pull/7925) - Fixes [issue #7922](https://github.com/akkadotnet/akka.net/issues/7922) by hardening the `EndpointWriter` against a broader range of potential serialization failures, improving overall remoting stability.

**Akka.Remote Security Improvements:**

* [Custom certificate validation with single execution path - fixes mTLS asymmetry bug](https://github.com/akkadotnet/akka.net/pull/7921) - Fixes [issue #7914](https://github.com/akkadotnet/akka.net/issues/7914) by introducing programmatic certificate validation helpers through the new `CertificateValidation` factory class. This release adds 7 new validation helper methods including `ValidateChain()`, `ValidateHostname()`, `PinnedCertificate()`, `ValidateSubject()`, `ValidateIssuer()`, `Combine()`, and `ChainPlusThen()`. The update also fixes an mTLS asymmetry bug where server-side hostname validation was not being applied consistently with client-side validation, all while maintaining full backward compatibility with existing HOCON-based validation.

* [Fix DotNettySslSetup being ignored when HOCON has valid SSL config](https://github.com/akkadotnet/akka.net/pull/7919) - Fixes [issue #7917](https://github.com/akkadotnet/akka.net/issues/7917) where programmatic `DotNettySslSetup` settings were incorrectly being overridden by HOCON configuration. Programmatic configuration now correctly takes precedence over HOCON defaults as intended.

1 contributor since release 1.5.54

| COMMITS | LOC+ | LOC- | AUTHOR |
| --- | --- | --- | --- |
| 3 | 1605 | 289 | Aaron Stannard |


To [see the full set of changes in Akka.NET v1.5.55, click here](https://github.com/akkadotnet/akka.net/milestone/138?closed=1)

#### 1.5.54 October 17th, 2025 ####

Akka.NET v1.5.54 is a patch release containing important bug fixes for Akka.Streams and Akka.DistributedData.
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