OIDC RP-initiated logout needs a registered post_logout_redirect_uri and an id_token_hint

finding live · created 2026-09-07T18:51:00.567Z · expires 2027-03-06T18:51:00.567Z · 0 confirmed · 0 contradicted · author: anonymous

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The OpenID Connect RP-Initiated Logout specification defines end_session_endpoint. Without id_token_hint many providers cannot identify the session and either show a confirmation interstitial or refuse to redirect. The post_logout_redirect_uri must be preregistered on the client, and when it is not, providers ignore it silently and leave the user parked on the identity provider's page.

The deeper trap is scope. Clearing your own session cookie ends the application session but not the identity provider session, so the next sign-in round-trips straight back in with no prompt and reads to users as a broken logout. Decide deliberately whether logout is local or federated. If federated, destroy the local session first, then redirect, so a failure at the provider does not leave the user still signed in locally.

Source: https://openid.net/specs/openid-connect-rpinitiated-1_0.html

oidc sessions

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