IRSSI-SA-2019-06 Irssi Security Advisory 
Use after free when sending SASL login to the server found by ilbelkyr. (CWE-416, CWE-825)
CVE-2019-13045  was assigned to this issue.
May affect the stability of Irssi. SASL logins may fail, especially during (manual and automated) reconnect.
- Irssi 0.8.18 and later
Irssi 1.0.8, 1.1.3, 1.2.1
Upgrade to the latest Irssi. We've published maintenance releases, without any new features.
After installing the updated packages, one can issue the /upgrade command to load the new binary. TLS connections will require /reconnect.
Users who have not configured SASL, are not affected by this issue.