diff --git a/app/src/main/kotlin/com/x8bit/bitwarden/data/credentials/manager/BitwardenCredentialManagerImpl.kt b/app/src/main/kotlin/com/x8bit/bitwarden/data/credentials/manager/BitwardenCredentialManagerImpl.kt
index 1f6ff9d545..ee73aa9123 100644
--- a/app/src/main/kotlin/com/x8bit/bitwarden/data/credentials/manager/BitwardenCredentialManagerImpl.kt
+++ b/app/src/main/kotlin/com/x8bit/bitwarden/data/credentials/manager/BitwardenCredentialManagerImpl.kt
@@ -20,6 +20,7 @@ import com.bitwarden.fido.Fido2CredentialAutofillView
 import com.bitwarden.fido.Origin
 import com.bitwarden.fido.UnverifiedAssetLink
 import com.bitwarden.sdk.Fido2CredentialStore
+import com.bitwarden.ui.platform.base.util.prefixHttpsIfNecessary
 import com.bitwarden.ui.platform.base.util.prefixHttpsIfNecessaryOrNull
 import com.bitwarden.ui.platform.base.util.toAndroidAppUriString
 import com.bitwarden.vault.CipherListView
@@ -343,7 +344,16 @@ class BitwardenCredentialManagerImpl(
             ?.let { ClientData.DefaultWithCustomHash(hash = it) }
             ?: return Fido2RegisterCredentialResult.Error.InvalidAppSignature
 
-        val sdkOrigin = createPublicKeyCredentialRequest.origin
+        val requestedOrigin = this
+            .getPasskeyAttestationOptionsOrNull(createPublicKeyCredentialRequest.requestJson)
+            ?.relyingParty
+            ?.id
+            ?.prefixHttpsIfNecessary()
+
+        // PM-35130: We use the requested relying party for the basis of the origin for privileged
+        // apps to ensure that related-origin requests are processed successfully. In the future,
+        // the SDK should handle this for us and we will be able to send in the real origin.
+        val sdkOrigin = (requestedOrigin ?: createPublicKeyCredentialRequest.origin)
             ?.let { Origin.Web(it) }
             ?: return Fido2RegisterCredentialResult.Error.MissingHostUrl
 
diff --git a/app/src/test/kotlin/com/x8bit/bitwarden/data/credentials/manager/BitwardenCredentialManagerTest.kt b/app/src/test/kotlin/com/x8bit/bitwarden/data/credentials/manager/BitwardenCredentialManagerTest.kt
index 5f2974640d..13c88bc8c6 100644
--- a/app/src/test/kotlin/com/x8bit/bitwarden/data/credentials/manager/BitwardenCredentialManagerTest.kt
+++ b/app/src/test/kotlin/com/x8bit/bitwarden/data/credentials/manager/BitwardenCredentialManagerTest.kt
@@ -512,9 +512,10 @@ class BitwardenCredentialManagerTest {
 
     @Suppress("MaxLineLength")
     @Test
-    fun `registerFido2Credential should return MissingHostUrl when calling app if privileged and origin is missing`() =
+    fun `registerFido2Credential should return MissingHostUrl when calling app if privileged and relying party and origin are missing`() =
         runTest {
             every { mockCreatePublicKeyCredentialRequest.origin } returns null
+            every { json.decodeFromStringOrNull<PasskeyAttestationOptions>(any()) } returns null
 
             val result = bitwardenCredentialManager.registerFido2Credential(
                 userId = "mockUserId",
@@ -1503,7 +1504,7 @@ private val DEFAULT_ANDROID_ORIGIN = Origin.Android(
         assetLinkUrl = "https://$DEFAULT_HOST/.well-known/assetlinks.json",
     ),
 )
-private val DEFAULT_WEB_ORIGIN = Origin.Web("bitwarden.com")
+private val DEFAULT_WEB_ORIGIN = Origin.Web("https://bitwarden.com")
 private const val DEFAULT_FIDO2_AUTH_REQUEST_JSON = """
 {
   "allowCredentials": [],
diff --git a/app/src/test/kotlin/com/x8bit/bitwarden/ui/vault/feature/addedit/util/PasskeyAttestationOptionsTestHelpers.kt b/app/src/test/kotlin/com/x8bit/bitwarden/ui/vault/feature/addedit/util/PasskeyAttestationOptionsTestHelpers.kt
index ca96b181e1..099ebd8430 100644
--- a/app/src/test/kotlin/com/x8bit/bitwarden/ui/vault/feature/addedit/util/PasskeyAttestationOptionsTestHelpers.kt
+++ b/app/src/test/kotlin/com/x8bit/bitwarden/ui/vault/feature/addedit/util/PasskeyAttestationOptionsTestHelpers.kt
@@ -8,15 +8,15 @@ import com.x8bit.bitwarden.data.credentials.model.UserVerificationRequirement
  * Returns a mock FIDO 2 [PasskeyAttestationOptions] object to simulate a credential
  * creation request.
  */
-@Suppress("MaxLineLength")
 fun createMockPasskeyAttestationOptions(
     number: Int,
     userVerificationRequirement: UserVerificationRequirement =
         UserVerificationRequirement.PREFERRED,
     relyingPartyId: String = "mockPublicKeyCredentialRpEntity-$number",
-) = PasskeyAttestationOptions(
-    authenticatorSelection = PasskeyAttestationOptions
-        .AuthenticatorSelectionCriteria(userVerification = userVerificationRequirement),
+): PasskeyAttestationOptions = PasskeyAttestationOptions(
+    authenticatorSelection = PasskeyAttestationOptions.AuthenticatorSelectionCriteria(
+        userVerification = userVerificationRequirement,
+    ),
     challenge = "mockPublicKeyCredentialCreationOptionsChallenge-$number",
     excludeCredentials = listOf(
         PublicKeyCredentialDescriptor(