2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/3850This report covers the studies of energetic particle propagation and acceleration presented during the 27th ICRC in sessions OG 1.3 and 1.4, plus a few selected papers from neighbouring OG sections. We list problems discussed within these sections and we shortly describe selected interesting achievements and/or novel approaches.Rapporteur report for proceedings of the 27th Int. Cosmic Ray Conference in Hamburg (Latex, 8 pages)Astrophysicstext