We just released Zulip Server 12.3, which fixes a critical security issue and three other security vulnerabilities, along with a small number of bugfixes.
blog.zulip.com/2026/09/21/z...
blog.zulip.com
Zulip Server 12.3 security release
We released Zulip Server 12.3 today! This is a security release, fixing a
critical security issue (GHSA-42mq-rxcr-wj72) and three other security issues,
as well as several bugs.
We have requested CVE ...