* SECURITY UPDATE: out-of-bounds read and infinite loop in the *_toUtf16 converters used by the -DXML_UNICODE build (libexpatw) - debian/patches/CVE-2026-72522.patch: only treat a trailing high surrogate (0xD800-0xDBFF) as a split surrogate pair in DEFINE_UTF16_TO_UTF16(), masking with 0xFC instead of 0xF8 (libexpat PR #1296). - CVE-2026-72522 * SECURITY UPDATE: use-after-free through same-parser calls made from the application's custom encoding callbacks - debian/patches/CVE-2026-76957.patch: route the unknown-encoding convert and release callbacks through the handler call depth tracking so XML_Parse, XML_ParseBuffer, XML_GetBuffer, XML_ParserFree and XML_ParserReset are rejected from inside them (libexpat PR #1322). - CVE-2026-76957