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[stable35] fix(federation): post messages to the initiator origin from the remote page - #6210
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…e page A federated file is edited through /apps/richdocuments/remote on the instance that owns it, embedded in an iframe on the initiator instance. Since the origin hardening, document.js sends every message for the parent window to its own origin. In this case the parent is the initiator, so the browser drops them all, including UI_Close: the viewer on the initiator stays open over an empty page. Pass the origin of the initiator to the page. The remote endpoint only renders after the initiator passed the trusted server check and its token was confirmed, so the value is verified. Messages from that origin are accepted as well, so the initiator can still talk to the editor. Fixes #6094 Signed-off-by: Rikdekker <Rikdekker@users.noreply.github.com> Assisted-by: ClaudeCode:claude-opus-5-5
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Oct 20, 2026
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Backport of PR #6190