2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/227168We find solutions of supersymmetric string field theory that correspond to the photon marginal deformation in the boundary conformal field theory. We revisit the bosonic string marginal deformation and generate a real solution for it. We find a map between the solutions of bosonic and supersymmetric string field theories and suggest a universal solution to superstring field theory.v1. 17 pages; v2. 21 pages. Presentation expanded, fig. added, refs. added, typos correctedHigh Energy Physics - Theorytext