Specifies whether SharedArrayBuffers can be used in a non cross-origin-isolated context
Verified with Microsoft Edge 152.0.4191.53 — updated on July 10, 2026
Supported on: Microsoft Edge version 92, Windows 7 or later
Path in the GPO console
Computer Configuration\Administrative Templates\Microsoft Edge User Configuration\Administrative Templates\Microsoft Edge Description
Specifies whether SharedArrayBuffers can be used in a non-cross-origin-isolated context. A SharedArrayBuffer is a binary data buffer that's used to create views on shared memory. SharedArrayBuffers have a memory access vulnerability in several popular CPUs. If you enable this policy, sites are allowed to use SharedArrayBuffers with no restrictions. If you disable or don't configure this policy, sites are allowed to use SharedArrayBuffers only when cross-origin isolated. Microsoft Edge requires cross-origin isolation when using SharedArrayBuffers from Microsoft Edge version 91 onward for Web Compatibility reasons.
Registry
HKLM
Software\Policies\Microsoft\Edge HKCU
Software\Policies\Microsoft\Edge Value name: SharedArrayBufferUnrestrictedAccessAllowed
Enabled: SharedArrayBufferUnrestrictedAccessAllowed = 1
Disabled: SharedArrayBufferUnrestrictedAccessAllowed = 0
Export Builder
BETAConfigure the state, scope and options, then generate .reg, PowerShell, Intune and SCCM outputs — or add the setting to a multi-setting collection.
These exports write the registry — this is not a managed GPO. ⓘ
Applying both scopes creates an ambiguous configuration (computer takes precedence over user). Only do this intentionally.
.reg file
Windows Registry Editor Version 5.00
; Exported from gporais.com
; Policy: Specifies whether SharedArrayBuffers can be used in a non cross-origin-isolated context
; State: Enabled
; Scope: Computer (HKLM)
; Supported on: Microsoft Edge version 92, Windows 7 or later
[HKEY_LOCAL_MACHINE\Software\Policies\Microsoft\Edge]
"SharedArrayBufferUnrestrictedAccessAllowed"=dword:00000001More formats (PowerShell, Intune, SCCM)
PowerShell
# Exported from gporais.com
# Policy: Specifies whether SharedArrayBuffers can be used in a non cross-origin-isolated context
# State: Enabled
# Scope: Computer (HKLM)
# Supported on: Microsoft Edge version 92, Windows 7 or later
$path = 'HKLM:\Software\Policies\Microsoft\Edge'
New-Item -Path $path -Force | Out-Null
Set-ItemProperty -Path $path -Name 'SharedArrayBufferUnrestrictedAccessAllowed' -Value 1 -Type DWordIntune XML
No direct Policy CSP / OMA-URI mapping for this policy. Use the Intune Remediation tab, or ingest the ADMX in Intune.Intune Remediation
# === Detection script ===
# Exported from gporais.com
# Policy: Specifies whether SharedArrayBuffers can be used in a non cross-origin-isolated context
# State: Enabled
# Scope: Computer (HKLM)
# Supported on: Microsoft Edge version 92, Windows 7 or later
function Test-RegistryValue {
param(
[Parameter(Mandatory = $true)][string]$Path,
[Parameter(Mandatory = $true)][string]$Name,
[object]$Expected,
[ValidateSet('String', 'DWord', 'MultiString')][string]$Kind = 'String',
[switch]$Absent
)
try {
$item = Get-ItemProperty -LiteralPath $Path -Name $Name -ErrorAction Stop
} catch {
return $Absent.IsPresent
}
if ($Absent.IsPresent) { return $false }
$actual = $item.$Name
if ($Kind -eq 'DWord') { return ([int64]$actual) -eq ([int64]$Expected) }
if ($Kind -eq 'MultiString') {
$actualValues = @($actual)
$expectedValues = @($Expected)
if ($actualValues.Count -ne $expectedValues.Count) { return $false }
for ($i = 0; $i -lt $expectedValues.Count; $i++) {
if ([string]$actualValues[$i] -ne [string]$expectedValues[$i]) { return $false }
}
return $true
}
return [string]$actual -eq [string]$Expected
}
$checks = @(
(Test-RegistryValue -Path 'HKLM:\Software\Policies\Microsoft\Edge' -Name 'SharedArrayBufferUnrestrictedAccessAllowed' -Expected 1 -Kind DWord)
)
if ($checks -notcontains $false) {
Write-Output 'Compliant'
exit 0
}
Write-Output 'Non-compliant'
exit 1
# === Remediation script ===
# Exported from gporais.com
# Policy: Specifies whether SharedArrayBuffers can be used in a non cross-origin-isolated context
# State: Enabled
# Scope: Computer (HKLM)
# Supported on: Microsoft Edge version 92, Windows 7 or later
$path = 'HKLM:\Software\Policies\Microsoft\Edge'
New-Item -Path $path -Force | Out-Null
Set-ItemProperty -Path $path -Name 'SharedArrayBufferUnrestrictedAccessAllowed' -Value 1 -Type DWordSCCM scripts
# Exported from gporais.com
# Policy: Specifies whether SharedArrayBuffers can be used in a non cross-origin-isolated context
# State: Enabled
# Scope: Computer (HKLM)
# Supported on: Microsoft Edge version 92, Windows 7 or later
# SCCM Configuration Item guidance:
# Create a Configuration Item of type "Setting: Script".
# Discovery script: use the Detection script below.
# Remediation script: use the Remediation script below.
# Compliance rule: the Discovery script output equals 'Compliant'.
# === Detection script ===
# Exported from gporais.com
# Policy: Specifies whether SharedArrayBuffers can be used in a non cross-origin-isolated context
# State: Enabled
# Scope: Computer (HKLM)
# Supported on: Microsoft Edge version 92, Windows 7 or later
function Test-RegistryValue {
param(
[Parameter(Mandatory = $true)][string]$Path,
[Parameter(Mandatory = $true)][string]$Name,
[object]$Expected,
[ValidateSet('String', 'DWord', 'MultiString')][string]$Kind = 'String',
[switch]$Absent
)
try {
$item = Get-ItemProperty -LiteralPath $Path -Name $Name -ErrorAction Stop
} catch {
return $Absent.IsPresent
}
if ($Absent.IsPresent) { return $false }
$actual = $item.$Name
if ($Kind -eq 'DWord') { return ([int64]$actual) -eq ([int64]$Expected) }
if ($Kind -eq 'MultiString') {
$actualValues = @($actual)
$expectedValues = @($Expected)
if ($actualValues.Count -ne $expectedValues.Count) { return $false }
for ($i = 0; $i -lt $expectedValues.Count; $i++) {
if ([string]$actualValues[$i] -ne [string]$expectedValues[$i]) { return $false }
}
return $true
}
return [string]$actual -eq [string]$Expected
}
$checks = @(
(Test-RegistryValue -Path 'HKLM:\Software\Policies\Microsoft\Edge' -Name 'SharedArrayBufferUnrestrictedAccessAllowed' -Expected 1 -Kind DWord)
)
if ($checks -notcontains $false) {
Write-Output 'Compliant'
exit 0
}
Write-Output 'Non-compliant'
exit 1
# === Remediation script ===
# Exported from gporais.com
# Policy: Specifies whether SharedArrayBuffers can be used in a non cross-origin-isolated context
# State: Enabled
# Scope: Computer (HKLM)
# Supported on: Microsoft Edge version 92, Windows 7 or later
$path = 'HKLM:\Software\Policies\Microsoft\Edge'
New-Item -Path $path -Force | Out-Null
Set-ItemProperty -Path $path -Name 'SharedArrayBufferUnrestrictedAccessAllowed' -Value 1 -Type DWordBuilding a multi-setting collection? Add this setting and generate combined .reg / PowerShell / GPO scripts.