Linus Rath 9b9b4f7ef1 fix: reject cross-origin writes to the JMAP passthrough and other cookie-authed routes (GHSA-9mvj-98f5-9q6g) ...

The origin gate in the proxy only covered `/api/auth/*`. The JMAP
passthrough, `/api/settings`, `/api/wopi/launch`,
`/api/plugin-approval-status`, `/api/fetch-ical`, `/api/translate`,
`/api/caldav/discover`, `/api/calendar-agenda` and `/api/webdav` all act
with the session cookie and had no origin check. A page on a same-site
sibling origin receives SameSite=Lax cookies, so it could run arbitrary
JMAP as the signed-in user, including sharing mailboxes to a third
account.

The proxy now gates every `/api/` route except the WOPI file endpoints
the office editor calls server-to-server, and each of these handlers
checks again. The proxy also decides on the decoded path, so an escaped
spelling such as `/api/%61uth/session` no longer skips the gate.

2026-09-26 14:08:44 +02:00

..

route.ts

fix: reject cross-origin writes to the JMAP passthrough and other cookie-authed routes (GHSA-9mvj-98f5-9q6g)

2026-09-26 14:08:44 +02:00