diff --git a/pkg/server/admin.go b/pkg/server/admin.go
index 9e44240abcdc..e4ca6f7fdf2a 100644
--- a/pkg/server/admin.go
+++ b/pkg/server/admin.go
@@ -81,6 +81,7 @@ import (
 	gwutil "github.com/grpc-ecosystem/grpc-gateway/utilities"
 	"google.golang.org/grpc"
 	"google.golang.org/grpc/codes"
+	"google.golang.org/grpc/metadata"
 	grpcstatus "google.golang.org/grpc/status"
 )
 
@@ -275,13 +276,15 @@ func (s *adminServer) RegisterGateway(
 			http.Error(w, "invalid id", http.StatusBadRequest)
 			return
 		}
-		// Add default user when running in Insecure mode because we don't
-		// retrieve the user from gRPC metadata (which falls back to `root`)
-		// but from HTTP metadata (which does not).
-		if s.sqlServer.cfg.Insecure {
-			ctx := req.Context()
-			ctx = authserver.ContextWithHTTPAuthInfo(ctx, username.RootUser, 0)
-			req = req.WithContext(ctx)
+
+		// The privilege checks in the privilege checker below checks the user in the incoming
+		// gRPC metadata.
+		md := authserver.TranslateHTTPAuthInfoToGRPCMetadata(req.Context(), req)
+		authCtx := metadata.NewIncomingContext(req.Context(), md)
+		authCtx = s.AnnotateCtx(authCtx)
+		if err := s.privilegeChecker.RequireViewActivityAndNoViewActivityRedactedPermission(authCtx); err != nil {
+			http.Error(w, err.Error(), http.StatusForbidden)
+			return
 		}
 		s.getStatementBundle(req.Context(), id, w)
 	})
@@ -2601,12 +2604,12 @@ func (s *adminServer) QueryPlan(
 }
 
 // getStatementBundle retrieves the statement bundle with the given id and
-// writes it out as an attachment.
+// writes it out as an attachment. Note this function assumes the user has
+// permission to access the statement bundle.
 func (s *adminServer) getStatementBundle(ctx context.Context, id int64, w http.ResponseWriter) {
-	sqlUsername := authserver.UserFromHTTPAuthInfoContext(ctx)
 	row, err := s.internalExecutor.QueryRowEx(
 		ctx, "admin-stmt-bundle", nil, /* txn */
-		sessiondata.InternalExecutorOverride{User: sqlUsername},
+		sessiondata.NodeUserSessionDataOverride,
 		"SELECT bundle_chunks FROM system.statement_diagnostics WHERE id=$1 AND bundle_chunks IS NOT NULL",
 		id,
 	)
@@ -2625,7 +2628,7 @@ func (s *adminServer) getStatementBundle(ctx context.Context, id int64, w http.R
 	for _, chunkID := range chunkIDs {
 		chunkRow, err := s.internalExecutor.QueryRowEx(
 			ctx, "admin-stmt-bundle", nil, /* txn */
-			sessiondata.InternalExecutorOverride{User: sqlUsername},
+			sessiondata.NodeUserSessionDataOverride,
 			"SELECT data FROM system.statement_bundle_chunks WHERE id=$1",
 			chunkID,
 		)
diff --git a/pkg/server/application_api/stmtdiag_test.go b/pkg/server/application_api/stmtdiag_test.go
index 637ab1ef00b4..0ff3e3b3ca91 100644
--- a/pkg/server/application_api/stmtdiag_test.go
+++ b/pkg/server/application_api/stmtdiag_test.go
@@ -13,6 +13,7 @@ package application_api_test
 import (
 	"context"
 	"fmt"
+	"net/http"
 	"testing"
 	"time"
 
@@ -34,39 +35,58 @@ func TestAdminAPIStatementDiagnosticsBundle(t *testing.T) {
 	defer leaktest.AfterTest(t)()
 	defer log.Scope(t).Close(t)
 
-	s, db, _ := serverutils.StartServer(t, base.TestServerArgs{})
+	s := serverutils.StartServerOnly(t, base.TestServerArgs{})
 	defer s.Stopper().Stop(context.Background())
-
 	ts := s.ApplicationLayer()
+	conn := sqlutils.MakeSQLRunner(ts.SQLConn(t))
 
 	query := "EXPLAIN ANALYZE (DEBUG) SELECT 'secret'"
-	_, err := db.Exec(query)
-	require.NoError(t, err)
+	conn.Exec(t, query)
 
 	query = "SELECT id FROM system.statement_diagnostics LIMIT 1"
-	idRow, err := db.Query(query)
-	require.NoError(t, err)
+	idRow := conn.Query(t, query)
 	var diagnosticRow string
 	if idRow.Next() {
-		err = idRow.Scan(&diagnosticRow)
+		err := idRow.Scan(&diagnosticRow)
 		require.NoError(t, err)
 	} else {
 		t.Fatal("no results")
 	}
 
-	client, err := ts.GetAuthenticatedHTTPClient(false, serverutils.SingleTenantSession)
-	require.NoError(t, err)
-	resp, err := client.Get(ts.AdminURL().WithPath("/_admin/v1/stmtbundle/" + diagnosticRow).String())
-	require.NoError(t, err)
-	defer resp.Body.Close()
-	require.Equal(t, 500, resp.StatusCode)
+	reqBundle := func(isAdmin bool, expectedStatusCode int) {
+		client, err := ts.GetAuthenticatedHTTPClient(isAdmin, serverutils.SingleTenantSession)
+		require.NoError(t, err)
+		resp, err := client.Get(ts.AdminURL().WithPath("/_admin/v1/stmtbundle/" + diagnosticRow).String())
+		require.NoError(t, err)
+		defer func() {
+			err := resp.Body.Close()
+			require.NoError(t, err)
+		}()
+		require.Equal(t, expectedStatusCode, resp.StatusCode)
+	}
 
-	adminClient, err := ts.GetAuthenticatedHTTPClient(true, serverutils.SingleTenantSession)
-	require.NoError(t, err)
-	adminResp, err := adminClient.Get(ts.AdminURL().WithPath("/_admin/v1/stmtbundle/" + diagnosticRow).String())
-	require.NoError(t, err)
-	defer adminResp.Body.Close()
-	require.Equal(t, 200, adminResp.StatusCode)
+	t.Run("with admin role", func(t *testing.T) {
+		reqBundle(true, http.StatusOK)
+	})
+
+	t.Run("no permissions", func(t *testing.T) {
+		reqBundle(false, http.StatusForbidden)
+	})
+
+	t.Run("with VIEWACTIVITYREDACTED role", func(t *testing.T) {
+		// VIEWACTIVITYREDACTED cannot download bundles due to PII.
+		// This will be revisited once we allow requesting and downloading redacted bundles.
+		conn.Exec(t, fmt.Sprintf("GRANT SYSTEM VIEWACTIVITYREDACTED TO %s", apiconstants.TestingUserNameNoAdmin().Normalized()))
+		reqBundle(false, http.StatusForbidden)
+		conn.Exec(t, fmt.Sprintf("REVOKE SYSTEM VIEWACTIVITYREDACTED FROM %s", apiconstants.TestingUserNameNoAdmin().Normalized()))
+	})
+
+	t.Run("with VIEWACTIVITY role", func(t *testing.T) {
+		// VIEWACTIVITY users can download bundles.
+		conn.Exec(t, fmt.Sprintf("GRANT SYSTEM VIEWACTIVITY TO %s", apiconstants.TestingUserNameNoAdmin().Normalized()))
+		reqBundle(false, http.StatusOK)
+		conn.Exec(t, fmt.Sprintf("REVOKE SYSTEM VIEWACTIVITY FROM %s", apiconstants.TestingUserNameNoAdmin().Normalized()))
+	})
 }
 
 func TestCreateStatementDiagnosticsReport(t *testing.T) {