An issue was discovered in NeoMutt before 2018-07-16. newsrc.c does not properly restrict '/' characters that may have unsafe interaction with cache pathnames.
{ "ubuntu_priority": "medium", "availability": "Available with Ubuntu Pro: https://ubuntu.com/pro", "binaries": [ { "binary_name": "neomutt", "binary_version": "20171215+dfsg.1-1ubuntu0.1~esm1" }, { "binary_name": "neomutt-dbgsym", "binary_version": "20171215+dfsg.1-1ubuntu0.1~esm1" } ] }