Bottom line: not urgent — plan it, don't rush it. Keycloak 26.8.0 fixes seven CVEs, published as six medium and one low, none high or critical. Schedule it because SCIM, multi-cluster v2 and client secret rotation move from preview to supported, and brute-force lockouts now persist to your database by default.
Bottom line: upgrade this week if you are on 26.7. If you are on 26.6 or 26.4, the fixes are merged to your branch but nobody has tagged a release, so there is no build to take. Keycloak 26.7.5 fixes 14 CVEs: ten in Keycloak, none rated above medium (6.5), and four in bundled libraries, one of them critical. Three breaking changes, one of which changes what lands in your tokens.
Keycloak publishes releases and container images for the current minor version only. It does backport selected security fixes to the two most recent even-numbered branches, and it tags them — but it cuts no GitHub release and builds no image from those tags. As of today there are nine such tags on release/26.4 and three on release/26.6, containing fixes for CVEs that were announced months ago, that you cannot docker pull from anywhere upstream.
Phase Two now builds them. quay.io/phasetwo/keycloak:26.4.16 and quay.io/phasetwo/keycloak:26.6.7 exist today, built from the tag's own Dockerfile, and we intend to keep building the two previous minor lines alongside the current one for as long as upstream keeps backporting to them.
Bottom line: upgrade this week if your login page or SAML endpoints are reachable from the internet, or if you run stateless mode on MySQL/MariaDB. Otherwise take it in your normal cycle. Keycloak 26.7.4 fixes six CVEs — five published as high, one medium. Two of them let an unauthenticated attacker exhaust memory and crash the server by hitting endpoints that are open by definition. One breaking change, in Authorization Services URI matching.
Bottom line: not an emergency, but upgrade this week if you use token exchange with a Google or Microsoft broker, or FGAP v2 to delegate admin rights. On 26.4, 26.5 or 26.6 there is no patch for you today. Keycloak 26.7.3 fixes 20 CVEs — one high, 17 medium, one low, one unrated — plus two breaking changes. Every one needs a delegated admin account, client credentials, or an intercepted authorization code; the single high is in a test-only dependency.