CVE-2026-54582: External Control of File Name or Path

mport is the MidnightBSD Package Manager. Prior to 2.7.8, package installation lacked a preflight check for incoming non-directory assets that already existed on disk. The affected logic across libmport/checkpreconditions.c, libmport/installprimative.c, and libmport/mportprivate.h did not apply...