SecCodeBench-V2 Technical Report. - Longfei Chen; Ji Zhao; Lanxiao Cui; Tong Su; Xingbo Pan; Ziyang Li; Yongxing Wu; Qijiang Cao; Qiyao Cai; Jing Zhang 170; Yuandong Ni; Junyao He; et al. (CoRR, 2026)