CVE-2026-40592 FreeScout's cross-user undo reply allows mailbox peers to recall another agent's outbound reply

FreeScout is a free self-hosted help desk and shared mailbox. Prior to version 1.8.214, the undo-send route GET /conversation/undo-reply/threadid checks only whether the current user can view the parent conversation. It does not verify that the current user created the reply being undone. In a...

CVE-2026-40592 FreeScout's cross-user undo reply allows mailbox peers to recall another agent's outbound reply

FreeScout is a free self-hosted help desk and shared mailbox. Prior to version 1.8.214, the undo-send route GET /conversation/undo-reply/threadid checks only whether the current user can view the parent conversation. It does not verify that the current user created the reply being undone. In a...

CVE-2026-40592

FreeScout (self-hosted help desk) prior to 1.8.214 is affected by CVE-2026-40592. The vulnerability lies in the undo-send route GET /conversation/undo-reply/{thread_id}, which only checks whether the current user can view the parent conversation and does not verify that the user created the reply...