# PowerShell v7.7.0-preview.4 — v7.7.0-preview.4 Release of PowerShell

- Product: PowerShell (https://whatsnew.fyi/product/powershell)
- Vendor: Microsoft
- Date: 2026-09-01
- Version: v7.7.0-preview.4
- Original notes: https://github.com/PowerShell/PowerShell/releases/tag/v7.7.0-preview.4
- Permalink: https://whatsnew.fyi/product/powershell/releases/v7.7.0-preview.4
- Labels: Pre-release

What's New is an index, not a publisher: every entry below links to the vendor's own release notes, which are the authoritative source. Entries are labelled where they are hand-curated sample data, pre-releases, or drawn from a secondary source such as a developer blog.

Reuse: the summaries, labels and curation here are © What's New. Quote freely with attribution and a link back; wholesale republication of the corpus is not permitted — terms: https://whatsnew.fyi/terms. The vendors' own release notes remain their publishers'.

---

- **fixed** — Fix FileOnlyEntry crashing on older versions of Windows
- **changed** — Call CodeGeneration.EscapeSingleQuotedStringContent API in SyncCurrentLocationHandler
- **changed** — Improve PowerShell Remoting Argument Validation
- **changed** — Improve validation for data fragments for PSRP frame headers
- **changed** — Add the xsd validation back for CIM cmdlets
- **fixed** — Fix PATH caching in CommandDiscovery code
- **added** — Add support for new WLDP setting EnableFileOnlyEntry
- **fixed** — Fix the dot-sourcing behavior of pwsh -file for advanced-function scripts
- **changed** — Improve output file path determination for Invoke-WebRequest
- **changed** — Improve Authorization Header default and redirect behavior
- **fixed** — Fix the regression in tab completing positional parameters
- **added** — Add New-TemporaryDirectory cmdlet
- **removed** — Remove Test-Bom and the boms JSON files

##### [7.7.0-preview.4]

###### Engine Updates and Fixes

- Fix `FileOnlyEntry` crashing on older versions of Windows (#27880)
- Call `CodeGeneration.EscapeSingleQuotedStringContent` API in `SyncCurrentLocationHandler` (#27874)
- Improve PowerShell Remoting Argument Validation (#27870)
- Improve validation for data fragments for PSRP frame headers (#27871)
- Add the xsd validation back for CIM cmdlets (#27869)
- Fix PATH caching in `CommandDiscovery` code (#27809)
- Add support for new WLDP setting `EnableFileOnlyEntry` (#26752)
- Fix the dot-sourcing behavior of `pwsh -file` for advanced-function scripts (#27727)

###### General Cmdlet Updates and Fixes

- Improve output file path determination for `Invoke-WebRequest` (#27872)
- Improve Authorization Header default and redirect behavior (#27873)
- Fix the regression in tab completing positional parameters (#27857)
- Add `New-TemporaryDirectory` cmdlet (#27549) (Thanks @KirtiRamchandani!)

###### Code Cleanup

<details>

<summary>

<p>We thank the following contributors!</p>

</summary>

<ul>
<li>Remove <code>Test-Bom</code> and the boms JSON files (#27726)</li>
</ul>

</details>

###### Tests

- Fix the scripts used for `Copy-Item -FromSession/-ToSession` scenarios and also enable tests  (#27773)
- Fix TimeZone test with duplicate names (#27525) (Thanks @KirtiRamchandani!)

###### Build and Packaging Improvements

<details>

<summary>

<p>We thank the following contributors!</p>

</summary>

<ul>
<li>Add the needed variable groups to the MSIX VPack pipeline to enforce using the production ADO feed (#27896)</li>
<li>Fix install dotnet for non-early-access release (#27892)</li>
<li>Localized file check-in by OneLocBuild Task: Build definition ID 13420: Build ID 2691582 (#27876)</li>
<li>Fix comments in <code>CmdletizationCoreResources.resx</code> (#27879)</li>
<li>Localized file check-in by OneLocBuild Task: Build definition ID 13420: Build ID 2684623 (#27841)</li>
<li>Use Azure CLI for early-access feed token (#27849)</li>
<li>Fix OneBranch output variables for early .NET jobs (#27843)</li>
<li>Localized file check-in by OneLocBuild Task: Build definition ID 13420: Build ID 2674492 (#27821)</li>
<li>Localized file check-in by OneLocBuild Task: Build definition ID 13420: Build ID 2670960 (#27802)</li>
<li>Use .NET SDK and NuGet feed early access for build, package and release pipelines (#27795)</li>
<li>Update Microsoft.PowerShell.Archive version to 1.2.6 (#27784)</li>
<li>PMC: Remove EOL debian12 distribution for v7.7.0 preview (#27763)</li>
<li>PMC: Add Ubuntu 26.04 distribution for v7.7.0 (#27765)</li>
<li>Localized file check-in by OneLocBuild Task: Build definition ID 13420: Build ID 2661935 (#27766)</li>
<li>Localized file check-in by OneLocBuild Task: Build definition ID 13420: Build ID 2660148 (#27752)</li>
<li>Update the manifest resource names for the localized resources embedded in satellite assemblies (#27756)</li>
<li>Update <code>LocProject.json</code> to list each English resource file directly (#27751)</li>
<li>Localized file check-in by OneLocBuild Task: Build definition ID 13420: Build ID 2652124 (#27736)</li>
<li>Fix min-size package and ship localized resources only for MSIX packages (#27725)</li>
<li>Fix the W3C URIs in <code>.resx</code> resource files (#27729)</li>
<li>Update <code>metadata.json</code> for July releases (#27704)</li>
<li>Prepare for onboarding PowerShell to the Native2Native localization pipeline (#27667)</li>
</ul>

</details>

###### Documentation and Help Content

- Update changelogs for v7.4.18, v7.5.9, and v7.6.4 (#27707)

[7.7.0-preview.4]: https://github.com/PowerShell/PowerShell/compare/v7.7.0-preview.3...v7.7.0-preview.4



###### SHA256 Hashes of the release artifacts

- hashes.sha256
  - FF4CA6054D43BC4E68C892B3DB48778353A51E9F76AAAD7A3FEDF4F967E89E89
- powershell-7.7.0-preview.4-linux-arm32.tar.gz
  - 57D89745159A3A3966CF47E9743A42BDB61F

_[Truncated at 4000 characters — full notes: https://github.com/PowerShell/PowerShell/releases/tag/v7.7.0-preview.4]_