SECURITY UPDATE: heap buffer under-read in clean_metalink_string()
debian/patches/CVE-2026-58469.patch: bound the backward whitespace
scan with end > beg in src/metalink.c so an all-whitespace Metalink
URL cannot read before the start of the buffer
CVE-2026-58469
SECURITY UPDATE: heap buffer overflow in convert_fname()
debian/patches/CVE-2026-58471.patch: correctly track used and
remaining space across the iconv E2BIG reallocation in src/url.c so
the output buffer is not overflowed
CVE-2026-58471
SECURITY UPDATE: integer and heap buffer overflow in html_quote_string()
debian/patches/CVE-2026-58472.patch: size the quoted string using
overflow-checked accumulation (size_t with INT_ADD_WRAPV) in
src/convert.c and abort on overflow instead of under-allocating