Background <p>Attachment-based parenting programs have shown promise in strengthening parent–child relationships. Although some studies have examined their impact on parental and child mental health, evidence remains limited, particularly in non-Western contexts. To our knowledge, this is the first study to implement an Arabic version of the Circle of Security Parenting program to address this gap.</p> Methods <p>The potential effectiveness of the Circle of Security Parenting program among Saudi Arabian parents of children aged 2–5 years old was evaluated using a one-group pretest–posttest design. A total of 114 parents enrolled; however, only 41 participants who completed all eight sessions were included in the final analysis.</p> Results <p>Post-intervention scores indicated reductions in parent-reported child behavioral difficulties and improvements in parental stress, depression, and anxiety.</p> Conclusion <p>These findings suggest that the Circle of Security Parenting program may be a promising attachment-based intervention for Saudi Arabian parents. Improvements in Depression Anxiety Stress Scale and Child Behavior Checklist scores from baseline to post-intervention highlight its potential utility. However, further research using controlled designs is needed to establish its effectiveness more robustly.</p>