CNBLUE has been announced as part of the third lineup for 'GMF 2026' (Grand Mint Festival 2026), alongside artists like Jung Seung-hwan and Solutions. CNBLUE will perform on the second day of the festival on October 18. The lineup for that day also includes nib.archive, Tokai, LOW, Roshi, and Guugu. The festival's first day on October 17 will feature Lee So-ra making a comeback to GMF after 12 years as the headliner. According to organizer Mint Paper, the festival will showcase diverse genres from ballad to indie and rock across four themed stages. Previously announced artists for the second lineup include artists such as Siaran, Younha, N.Flying, and ONEWE. The final lineup for GMF 2026 is scheduled to be announced on September 16.