product · inferred from evidence
Keycloak 26.0.x
A specific version range of the Keycloak identity and access management product.
- SAML IDP-initiated SSO fails with cookie_not_found behind NGINX (Keycloak 26)
After upgrading to Keycloak 26.0.x behind an NGINX ingress/proxy, SAML IDP-initiated SSO failed with a cookie_not_found error in the logs, while SP-initiated login from Keycloak still worked. The cause was cookie handling across the proxy: