Package: curl Version: 7.61.0-1 Followup-For: Bug #911333 curl supports colourised header output starting with 7.61.0 (enabled by default). Unfortunately the original code isn't properly compatible with all terminal emulators. The fixed code in 7.61.1 is a lot more compatible, but that's not in debian yet.
You can disable it with --no-styled-output (or "no-styled-output" in .curlrc) -- System Information: Debian Release: buster/sid APT prefers unstable APT policy: (500, 'unstable'), (1, 'experimental') Architecture: amd64 (x86_64) Foreign Architectures: i386 Kernel: Linux 4.18.0-1-amd64 (SMP w/2 CPU cores) Locale: LANG=POSIX, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8), LANGUAGE=POSIX (charmap=UTF-8) Shell: /bin/sh linked to /bin/dash Init: systemd (via /run/systemd/system) Versions of packages curl depends on: ii libc6 2.27-6 ii libcurl4 7.61.0-1 ii zlib1g 1:1.2.11.dfsg-1 curl recommends no packages. curl suggests no packages. -- no debconf information