NTIRE 2026 Rip Current Detection and Segmentation (RipDetSeg) Challenge Report. - Andrei Dumitriu; Aakash Ralhan; Florin Miron; Florin Tatui; Radu Tudor Ionescu; Radu Timofte; Abdullah Naeem; Anav Katwal; Ayon Dey; Md. Tamjidul Hoque; Asuka Shin; Hiroto Shirono; et al. (CoRR, 2026)