Rclone is a command-line program to sync files and directories to and from different cloud storage providers.
Rclone versions from 1.46.0 up to 1.74.3 contain a vulnerability in the rcd --rc-serve feature that allows unauthenticated GET and HEAD requests to execute arbitrary commands. This occurs because the remote parameter in the URL is parsed and used to initialize backends, which can include inline configuration that executes local commands. The vulnerability is fixed in version 1.74.3.
AI Analysis
Technical Summary
Rclone's rcd --rc-serve accepts unauthenticated GET and HEAD requests to paths formatted as /[remote:path]/object. The 'remote' parameter is parsed and used to initialize backend storage. Inline remote configuration options can cause execution of local commands during this initialization. Consequently, a single unauthenticated request can lead to arbitrary command execution under the rclone process user. This vulnerability affects versions from 1.46.0 through 1.74.2 and is resolved in 1.74.3.
Potential Impact
An unauthenticated remote attacker can execute arbitrary commands on the system running rclone with the privileges of the rclone process user. This can lead to full compromise of the affected system depending on the privileges of that user. The vulnerability affects confidentiality, integrity, and availability of the system.
Mitigation Recommendations
Upgrade rclone to version 1.74.3 or later, where this vulnerability is fixed. Until upgrading, avoid exposing the rcd --rc-serve interface to untrusted networks or users. No other vendor advisories or temporary mitigations are provided in the input data.
Rclone is a command-line program to sync files and directories to and from different cloud storage providers.
Description
Rclone versions from 1.46.0 up to 1.74.3 contain a vulnerability in the rcd --rc-serve feature that allows unauthenticated GET and HEAD requests to execute arbitrary commands. This occurs because the remote parameter in the URL is parsed and used to initialize backends, which can include inline configuration that executes local commands. The vulnerability is fixed in version 1.74.3.
CVSS v3.1
Affected software
pkg:deb/ubuntu/[email protected]?arch=source&distro=bionicpkg:deb/ubuntu/[email protected]+esm1?arch=source&distro=esm-apps/focalpkg:deb/ubuntu/[email protected]?arch=source&distro=jammypkg:deb/ubuntu/[email protected]+dfsg-3ubuntu0.24.04.6?arch=source&distro=noblepkg:deb/ubuntu/[email protected]+dfsg-4ubuntu2.1?arch=source&distro=questingpkg:deb/ubuntu/[email protected]+dfsg-4ubuntu3.2?arch=source&distro=resoluteRun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
Rclone's rcd --rc-serve accepts unauthenticated GET and HEAD requests to paths formatted as /[remote:path]/object. The 'remote' parameter is parsed and used to initialize backend storage. Inline remote configuration options can cause execution of local commands during this initialization. Consequently, a single unauthenticated request can lead to arbitrary command execution under the rclone process user. This vulnerability affects versions from 1.46.0 through 1.74.2 and is resolved in 1.74.3.
Potential Impact
An unauthenticated remote attacker can execute arbitrary commands on the system running rclone with the privileges of the rclone process user. This can lead to full compromise of the affected system depending on the privileges of that user. The vulnerability affects confidentiality, integrity, and availability of the system.
Mitigation Recommendations
Upgrade rclone to version 1.74.3 or later, where this vulnerability is fixed. Until upgrading, avoid exposing the rcd --rc-serve interface to untrusted networks or users. No other vendor advisories or temporary mitigations are provided in the input data.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- UBUNTU-CVE-2026-49980
- Osv Schema Version
- 1.7.0
- Aliases
- []
- Ecosystems
- ["Ubuntu:18.04:LTS","Ubuntu:Pro:20.04:LTS","Ubuntu:22.04:LTS","Ubuntu:24.04:LTS","Ubuntu:25.10","Ubuntu:26.04:LTS"]
- Database Specific Severity
- null
- Cvss Version
- 3.1
Threat ID: 6a6bde219c2644c7f8dcb7b3
Added to database: 07/30/2026, 23:28:33 UTC
Last enriched: 07/31/2026, 00:19:46 UTC
Last updated: 07/31/2026, 00:19:47 UTC
Views: 4
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