Já que o Tails é baseado no Debian, ele tira vantagem de todo o trabalho feito pelo time de segurança do Debian. Conforme consta em http://security.debian.org/:

O Debian leva a segurança muito a sério. Nós tratamos de todos os problemas de segurança que são trazidos à nossa atenção e asseguramos que eles sejam corrigidos num intervalo de tempo razoável. Muitos avisos de segurança são coordenados com outros distribuidores de software livre e são publicados no mesmo dia que a vulnerabilidade é anunciada publicamente e nós também temos um time de Auditoria de Segurança que revisa os repositórios procurando por falhas de segurança novas ou não corrigidas.

A experiência mostrou que "segurança por obscuridade" não funciona. A divulgação pública permite soluções melhores e mais rápidas para problemas de segurança. Nesse sentido, esta página cuida do estado do Debian a respeito de várias brechas de segurança conhecidas e que potencialmente podem afetar o Debian.

Brechas atuais

Brechas prováveis

Até que uma auditoria do conjunto de applicações seja realizada, vazamentos de informação no nível do protocolo devem ser consideradas como − no mínimo − possíveis.

Brechas corrigidas

ADVERTÊNCIA: algumas destas brechas podem ter sido corrigidas apenas no Git. Por gentileza leia a seção "Versões afetadas" abaixo.

Numerous security holes in Tails 3.2
Posted Sat 11 Nov 2017 01:34:56 PM CET
Numerous security holes in Tails 3.1
Posted Sat 23 Sep 2017 02:34:56 PM CEST
Numerous security holes in Tails 3.0.1
Posted Sat 05 Aug 2017 07:37:22 PM CEST
Numerous security holes in Tails 3.0
Posted Sun 02 Jul 2017 03:02:03 AM CEST
Numerous security holes in Tails 2.12
Posted Thu 08 Jun 2017 03:02:03 AM CEST
Numerous security holes in Tails 2.11
Posted Sun 16 Apr 2017 03:02:03 AM CEST
Numerous security holes in Tails 2.10
Posted Sun 05 Mar 2017 02:02:03 AM CET
Numerous security holes in Tails 2.9.1
Posted Sun 22 Jan 2017 02:02:03 AM CET
Numerous security holes in Tails 2.7.1
Posted Sun 11 Dec 2016 01:00:00 AM CET
Numerous security holes in Tails 2.7
Posted Mon 28 Nov 2016 02:02:03 AM CET
Numerous security holes in Tails 2.6
Posted Tue 15 Nov 2016 04:23:42 PM CET
Numerous security holes in Tails 2.5
Posted Sun 18 Sep 2016 03:02:03 AM CEST
Numerous security holes in Tails 2.4
Posted Sat 30 Jul 2016 03:02:03 AM CEST
Numerous security holes in Tails 2.3
Posted Sun 05 Jun 2016 03:02:03 AM CEST
Numerous security holes in Tails 2.2.1
Posted Sun 24 Apr 2016 03:02:03 AM CEST
Numerous security holes in Tails 2.2
Posted Tue 15 Mar 2016 02:02:03 AM CET
Numerous security holes in Tails 2.0.1
Posted Sun 06 Mar 2016 01:34:56 PM CET
Numerous security holes in Tails 2.0
Posted Fri 12 Feb 2016 08:05:28 PM CET
Numerous security holes in Tails 1.8.2
Posted Sun 24 Jan 2016 01:34:56 PM CET
Numerous security holes in Tails 1.8.1
Posted Thu 07 Jan 2016 01:34:56 PM CET
Numerous security holes in Tails 1.8
Posted Thu 17 Dec 2015 02:24:15 PM CET
Numerous security holes in Tails 1.7
Posted Sun 13 Dec 2015 02:02:03 AM CET
Numerous security holes in Tails 1.6
Posted Sun 01 Nov 2015 02:02:03 AM CET
Numerous security holes in Tails 1.5.1
Posted Sun 20 Sep 2015 03:02:03 AM CEST
Numerous security holes in Tails 1.5
Posted Wed 26 Aug 2015 03:02:03 AM CEST
Numerous security holes in Tails 1.4.1
Posted Sun 09 Aug 2015 03:02:03 AM CEST
Numerous security holes in Tails 1.4
Posted Sun 28 Jun 2015 03:02:03 AM CEST
Numerous security holes in Tails 1.3.2
Posted Sun 10 May 2015 03:02:03 AM CEST
Claws Mail leaks plaintext of encrypted emails to IMAP server
Posted Thu 07 May 2015 02:34:56 PM CEST
Numerous security holes in Tails 1.3.1
Posted Sun 29 Mar 2015 03:02:03 AM CEST
Numerous security holes in Tails 1.3
Posted Sun 22 Mar 2015 02:02:03 AM CET
Numerous security holes in Tails 1.2.3
Posted Mon 23 Feb 2015 01:00:00 AM CET
Numerous security holes in Tails 1.2.2
Posted Mon 12 Jan 2015 01:00:00 AM CET
Numerous security holes in Tails 1.2
Posted Mon 01 Dec 2014 01:00:00 AM CET
Numerous security holes in Tails 1.1.2
Posted Tue 14 Oct 2014 02:00:00 AM CEST
Numerous security holes in Tails 1.1.1
Posted Mon 22 Sep 2014 02:00:00 AM CEST
Numerous security holes in Tails 1.1
Posted Sun 31 Aug 2014 02:00:00 AM CEST
Security hole in I2P 0.9.13
Posted Thu 24 Jul 2014 11:15:00 PM CEST
Numerous security holes in Tails 1.0.1
Posted Sun 20 Jul 2014 02:00:00 AM CEST
Numerous security holes in Tails 1.0
Posted Sun 08 Jun 2014 02:00:00 AM CEST
Numerous security holes in Tails 0.23
Posted Sun 27 Apr 2014 02:00:00 AM CEST
Numerous security holes in Tails 0.22.1
Posted Sun 16 Mar 2014 01:00:00 AM CET
Numerous security holes in Tails 0.22
Posted Sat 01 Feb 2014 01:00:00 AM CET
Numerous security holes in Tails 0.21
Posted Fri 29 Nov 2013 01:00:00 AM CET
Numerous security holes in Tails 0.20.1
Posted Fri 25 Oct 2013 02:00:00 AM CEST
Numerous security holes in Tails 0.20
Posted Sat 14 Sep 2013 02:00:00 AM CEST
Numerous security holes in Tails 0.19
Posted Mon 05 Aug 2013 02:00:00 AM CEST
Numerous security holes in Tails 0.18
Posted Sat 22 Jun 2013 02:00:00 AM CEST
Numerous security holes in Tails 0.17.2
Posted Tue 14 May 2013 02:00:00 AM CEST
Numerous security holes in Tails 0.17.1
Posted Sat 06 Apr 2013 02:00:00 AM CEST
Numerous security holes in Tails 0.17
Posted Wed 20 Mar 2013 01:00:00 AM CET
Numerous security holes in Tails 0.16
Posted Fri 22 Feb 2013 01:00:00 AM CET
Numerous security holes in Tails 0.15
Posted Tue 08 Jan 2013 01:00:00 AM CET
Numerous security holes in Tails 0.14
Posted Sun 25 Nov 2012 01:00:00 AM CET
Numerous security holes in Tails 0.13
Posted Thu 08 Nov 2012 01:00:00 AM CET
Numerous security holes in Tails 0.12.1
Posted Sun 16 Sep 2012 02:00:00 AM CEST
Numerous security holes in Tails 0.11
Posted Mon 11 Jun 2012 02:00:00 AM CEST
Numerous security holes in Tails 0.10.2
Posted Sun 22 Apr 2012 02:00:00 AM CEST
Numerous security holes in Tails 0.10.1
Posted Thu 01 Mar 2012 01:00:00 AM CET
Numerous security holes in Tails 0.10
Posted Fri 27 Jan 2012 01:00:00 AM CET
Numerous security holes in Tails 0.9
Posted Sun 01 Jan 2012 01:00:00 AM CET
Numerous security holes in Tails 0.8.1
Posted Thu 10 Nov 2011 01:00:00 AM CET
Numerous security holes in Tails 0.8
Posted Fri 14 Oct 2011 01:12:13 PM CEST
Numerous security holes in Tails 0.7.2
Posted Wed 14 Sep 2011 01:12:13 PM CEST
Numerous security holes in Tails 0.7.1
Posted Fri 10 Jun 2011 01:12:13 PM CEST
Numerous security holes in Tails 0.7
Posted Thu 28 Apr 2011 01:12:13 PM CEST
Numerous security holes in Tails 0.6.2
Posted Mon 04 Apr 2011 01:12:13 PM CEST
Numerous security holes in T(A)ILS 0.6.1
Posted Mon 17 Jan 2011 12:12:13 PM CET
Numerous security holes in T(A)ILS 0.6
Posted Wed 22 Dec 2010 12:12:13 PM CET
Numerous security holes in T(A)ILS 0.5
Posted Sun 17 Oct 2010 01:12:13 PM CEST
Iceweasel exposes a rare User-Agent
Posted Fri 03 Sep 2010 03:15:14 AM CEST
Numerous security holes in previous amnesia versions
Posted Sun 25 Apr 2010 01:12:13 PM CEST
Icedove (Thunderbird) leaks the real IP address
Posted Mon 07 Dec 2009 12:20:24 PM CET
Use of cleartext swap partitions on local hard disks
Posted Sun 22 Nov 2009 12:20:24 PM CET
Ineffective firewall-level Tor enforcement
Posted Sun 22 Nov 2009 12:20:24 PM CET

Auditorias

Auditorias do Tails das quais ficamos sabendo são coletadas em audits.