Since Tails is based on Debian, it takes advantage of all the work done by the Debian security team. As quoted from <https://www.debian.org/security/>:
[[!inline pages="page(security/*) and !security/*/* and !security/fixed and !security/fixed.* and !security/fixed/* and !tagged(security/fixed)" actions=no archive=yes feeds=no show=0 sort="-meta(date) age -path"]]
[[!inline pages="page(security/*) and !security/*/* and tagged(security/fixed) and !security/Numerous_security_holes_in_* and !security/known_security_vulnerabilities_in_*" actions=no archive=yes feeds=no show=10 sort="-meta(date) age -path"]]
[[!inline pages="page(security/*) and !security/*/* and !security/fixed and !security/fixed.* and !security/fixed/*" actions=no archive=yes feedonly=yes show=10 sort="-meta(date) age -path"]]