Bug 2538485 (CVE-2026-93987)

Summary: CVE-2026-93987 rclone: rclone: Path Traversal in Docker Volume Plugin
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
Status: NEW --- QA Contact:
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Priority: high    
Version: unspecifiedKeywords: Security
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Hardware: All   
OS: Linux   
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A flaw was found in rclone. The `rclone serve docker` volume plugin contains a path traversal vulnerability. A highly privileged attacker, by submitting a crafted Docker VolumeDriver.Create request with a malicious volume name, can cause the rclone plugin process to create a directory and mount a remote filesystem at an arbitrary host path. This could lead to shadowing or disrupting system directories, potentially resulting in denial of service or unauthorized file system modifications.
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
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Bug Depends On: 2539341, 2539342    
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Description OSIDB Bzimport 2026-09-22 18:40:33 UTC 
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.