bootstrap-icons/icons/exclamation-octagon-fill.svg

<svg xmlns="http://www.w3.org/2000/svg" width="16" height="16" fill="currentColor" class="bi bi-exclamation-octagon-fill" viewBox="0 0 16 16">
  <path d="M11.46.146A.5.5 0 0 0 11.107 0H4.893a.5.5 0 0 0-.353.146L.146 4.54A.5.5 0 0 0 0 4.893v6.214a.5.5 0 0 0 .146.353l4.394 4.394a.5.5 0 0 0 .353.146h6.214a.5.5 0 0 0 .353-.146l4.394-4.394a.5.5 0 0 0 .146-.353V4.893a.5.5 0 0 0-.146-.353zM8 4c.535 0 .954.462.9.995l-.35 3.507a.552.552 0 0 1-1.1 0L7.1 4.995A.905.905 0 0 1 8 4m.002 6a1 1 0 1 1 0 2 1 1 0 0 1 0-2"/>
</svg>