In mutt and neomutt, PGP encryption does not use the --hidden-recipient mode which may leak the Bcc email header field by inferring from the recipients info.
{ "priority_reason": "This is a longstanding limitation of PGP-encrypted mail and is an enhancement rather than an actual vulnerability.", "binaries": [ { "binary_name": "mutt", "binary_version": "1.5.24-1ubuntu0.6+esm3" }, { "binary_name": "mutt-patched", "binary_version": "1.5.24-1ubuntu0.6+esm3" } ] }