Aspire 13.4.5 is now available
The dotnet/aspire repository published v13.4.5 on 2026-06-17. The release notes list changes including: 🛡️ Bumped StreamJsonRpc to 2.25.29 to clear the MessagePack GHSA-hv8m-jj95-wg3x (CVE-2026-48109) NU1903 advisory — The transitive MessagePack 2.5.192…; 🎠playwrightCliVersion values that are not valid SemVer 2.0 now fail fast….
What was released From the source
dotnet/aspire published v13.4.5 on GitHub on 2026-06-17. Items listed in the release notes include:
- 🛡️ Bumped StreamJsonRpc to 2.25.29 to clear the MessagePack GHSA-hv8m-jj95-wg3x (CVE-2026-48109) NU1903 advisory — The transitive MessagePack 2.5.192…
- 🎠playwrightCliVersion values that are not valid SemVer 2.0 now fail fast with a clear diagnostic — Previously an invalid override (range expression…
- 🤖 CLI telemetry now detects and reports the calling coding agent — When the Aspire CLI is invoked from inside a known coding agent environment (GitHub…
- 📄 Refreshed the @microsoft/aspire-cli npm package README to be TypeScript-only — updated examples to the current ts-starter template (apphost.mts /…
At a glance · Runtime & Platform
What was releasedWhy it mattersWho should careUpgrade considerations
Why it matters Analysis
Changes to the .NET runtime, libraries and application frameworks shape performance, compatibility and the features available to every .NET application. Following them helps teams plan upgrades and adopt improvements deliberately.
Who should care Analysis
- .NET application developers
- Library and framework authors
- Teams planning .NET version upgrades
Upgrade considerations Analysis
- Read the complete release notes for breaking changes and known issues.
- Update the relevant NuGet packages in a branch and run your tests before merging.
- Try new features or previews in a test project first.
- Check the .NET breaking-changes documentation before upgrading major versions.
Sources and further reading
- Release notes for v13.4.5 on GitHub (original source)
Original: “Aspire 13.4.5”, Aspire releases, published 17 Jun 2026, retrieved 16 Oct 2026. This article was generated from the official source using our structured templates and passed automated quality checks. Spotted a mistake? See our corrections policy.