Single Logout Is Harder Than SSO, and Usually Doesn't Work

SAML and OpenID Connect describe single logout as a best-effort process rather than a guaranteed security control: SAML requires identity providers to report incomplete propagation with the PartialLogout status, while OIDC warns that browser restrictions on third-party storage can prevent front-channel logout from clearing relying-party sessions. Logout fan-out can fail because applications lack logout endpoints, are unreachable or slow, browser redirect chains are interrupted, cross-origin iframes cannot access session state, or users leave the page; moreover, ending browser sessions does not automatically revoke OAuth access or refresh tokens. The recommended approach is to make server-side sessions authoritative and revocable, use RP-initiated logout for an application’s own logout action, implement OIDC back-channel logout for reliable server-to-server notifications, revoke associated tokens, enforce short session lifetimes, and log partial failures rather than falsely claiming users were signed out everywhere. For enterprise requirements, the practical measure of access termination is the time to destroy sessions and revoke credentials, supported by session limits and deprovisioning, rather than a promise of universal logout propagation.

Use this post, company, and trend context to find content marketing opportunities, perform competitive analysis, or address product feature gaps via the Plushcap MCP server or the Plushcap API.