The AuthKit library for Next.js provides helpers for authentication and session management using WorkOS & AuthKit with Next.js.
A user can reuse an expired session by controlling the x-workos-session header. The vulnerability is patched in v0.4.2.
A capture-replay flaw exists when the design of the product makes it possible for a malicious user to sniff network traffic and bypass authentication by replaying it to the server in question to the same effect as the original message (or with minor changes).