void Document::didMergeTextNodes(Text& oldNode, unsigned offset)
{
    if (!m_ranges.isEmpty()) {
        NodeWithIndex oldNodeWithIndex(oldNode);
        for (Range* range : m_ranges)
            range->didMergeTextNodes(oldNodeWithIndex, offset);
    }

    if (m_frame)
        m_frame->selection().didMergeTextNodes(oldNode, offset);

}

This category addresses vulnerabilities caused by flawed access control mechanisms, where incorrect permission settings allow unauthorized users to access restricted resources.