Tails 4.0 fixes many security issues that affect Tails 3.16. You should upgrade to Tails 4.0 as soon as possible.
- Tor Browser: Mozilla Foundation Security Advisory 2019-33
- Linux: CVE-2019-15118, CVE-2019-15117, CVE-2019-16714, CVE-2019-14835, CVE-2019-15504, CVE-2019-14821, CVE-2019-14814, CVE-2019-14815, CVE-2019-14816, CVE-2019-15505, and CVE-2019-15538
- CUPS CVE-2019-8696, CVE-2019-8675, and more security fixes
- GnuPG: mitigate the certificates flooding attack
- e2fsprogs Debian Security Advisory 4535
- ghostscript: Debian Security Advisory 4518, Debian Security Advisory 4499
- WebKitGTK: Debian Security Advisory 4515
- Pango: Debian Security Advisory 4496
- ffmpeg: Debian Security Advisory 4502
- expat: Debian Security Advisory 4530
- GLib: CVE-2019-13012
- libmariadb3: numerous vulnerabilities
- NSS: CVE-2019-11719, CVE-2019-11727, CVE-2019-11729).
- LibreOffice: Debian Security Advisory 4519, Debian Security Advisory 4501, Debian Security Advisory 4483, and CVE-2019-9848
- Samba: Debian Security Advisory 4513
- OpenSSL: Debian Security Advisory 4539
- libxslt: CVE-2019-11068, CVE-2019-13117, and CVE-2019-13118
- zeromq3: Debian Security Advisory 4477
- patch: Debian Security Advisory 4489
- Thunderbird: Debian Security Advisory 4523, Debian Security Advisory 4482
- wpasupplicant: Debian Security Advisory 4538
- IBus: Debian Security Advisory 4525
- sudo: Debian Security Advisory 4543