CVE-2026-93987 rclone serve docker Path Traversal via Volume Name
An attacker can exploit path traversal in rclone's Docker volume plugin to create directories and mount remote filesystems at arbitrary host paths, potentially disrupting system operations.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-93987?
CVE-2026-93987 is a medium-severity path traversal vulnerability in rclone, published on 19 Sep 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
rclone versions 1.56.0 through 1.75.0 contain a path traversal vulnerability in the `rclone serve docker` volume plugin. newVolume() in cmd/serve/docker/volume.go computes a volume's mountpoint as filepath.Join(drv.root, name) from the attacker-supplied `name` field of a Docker VolumeDriver.Create request without verifying that the result stays within drv.root (default /var/lib/docker-volumes/rclone), and checkMountpoint() then creates that directory with file.MkdirAll before mounting. A volume name containing enough `..` components (e.g. "../../../../../../etc") therefore resolves outside the base directory, allowing anyone able to submit a VolumeDriver.Create request to the plugin socket — normally the Docker daemon, or a workload that can request named volumes in a multi-tenant orchestration setup — to make the privileged rclone plugin process create a directory and mount a remote filesystem specified in the same request at an arbitrary host path, shadowing or disrupting system directories. The advisory notes Volume.restoreState() had the same missing validation when reloading persisted volume state. Fixed in 1.75.1.
Weakness: CWE-73
Which versions are affected by CVE-2026-93987?
1 open source package ship an affected version, including rclone.
| Package | Affected | Fixed in |
|---|---|---|
rclone Bitnami | From 1.56.0 | 1.75.1 |
How do I fix CVE-2026-93987?
Upgrade rclone to 1.75.1 or later.
Upgrade, and resolve every user-supplied path against an allowed base folder before opening it. More about Path traversal.
Is CVE-2026-93987 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-93987 exists.
Sources
Also known as BIT-rclone-2026-93987, DEBIAN-CVE-2026-93987, GHSA-jg5v-4p8w-hwm3, GHSA-p6vx-hf7p-98j6, MINI-4399-7225-pm9j, MINI-6mcw-8vqp-c286 and 1 more.