rclone serve docker Path Traversal via Volume Name (CVE-2026-93987) | HOL Guard CVE

Unknown severity · Source severity not reportedCVE-2026-93987

rclone serve docker Path Traversal via Volume Name

Answer in brief

CVE-2026-93987 records a Unknown severity vulnerability in rclone serve docker Path Traversal via Volume Name. The current sources do not mark it as known exploited. The current feed maps rclone/rclone (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Sep 19, 2026Updated Sep 19, 2026Source checked Sep 19, 2026First seen by HOL Sep 19, 2026Material review Sep 19, 2026

Upstream Advisory

Key facts

Risk: Unknown severitySource severity not reported
Exploitation: Not marked as known exploited
Affected software: 1 mapped package or product
Fix availability: Available

Why this deserves its current priority

A CVSS score is not reported in the current record. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps rclone/rclone (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
rclone/rclonegeneric	>=1.56.0 <1.75.1	1.75.1

Recommended response

Check inventory. Check lockfiles and deployed manifests for rclone/rclone.
Review the reported fix. Update rclone/rclone to 1.75.1 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

Published upstream
Sep 19, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Sep 19, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Sep 19, 2026

Sources and claim methodology

Upstream source 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.

Quoted source text, attributed separately from HOL analysis.