BIT-RCLONE-2026-71309 rclone: Incomplete path validation allows backend root escape in serve restic

rclone is a command-line program to sync files and directories to and from different cloud storage providers. From 1.40.0 until 1.75.0, rclone serve restic does not correctly reject URL paths beginning with ../ in cmd/serve/restic/restic.go WithRemote, which accepts a leading parent path and pass...

CVE-2026-71309

A flaw was found in rclone. The rclone serve restic component, which handles cloud storage operations, contains an incomplete path validation vulnerability. An attacker with access to the REST endpoint can exploit this by using specially crafted URL paths containing directory traversal sequences...